message stringlengths 2 49.9k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 446 108k | cluster float64 13 13 | __index_level_0__ int64 892 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vertex u if there exists a directed edge from v to ... | instruction | 0 | 102,630 | 13 | 205,260 |
Tags: implementation, trees
Correct Solution:
```
n = int(input())
parent = [None] * n
children = [[] for i in range(n)]
for i in range(1, n):
p = int(input())
p = p - 1
parent[i] = p
children[p].append(i)
leaf = {}
for i in range(n):
if len(children[i]) == 0:
leaf[i] = True
else:
leaf[i] = False
for i in... | output | 1 | 102,630 | 13 | 205,261 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vertex u if there exists a directed edge from v to ... | instruction | 0 | 102,631 | 13 | 205,262 |
Tags: implementation, trees
Correct Solution:
```
from collections import defaultdict
n = int(input())
vert = defaultdict(list)
parents = set()
for i in range(1, n):
item = int(input())
if item != 1:
parents.add(item)
vert[item].append(i + 1)
#print(vert)
result = True
for par, childs in vert.it... | output | 1 | 102,631 | 13 | 205,263 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vertex u if there exists a directed edge from v to ... | instruction | 0 | 102,632 | 13 | 205,264 |
Tags: implementation, trees
Correct Solution:
```
#http://codeforces.com/problemset/problem/913/B
#solved
n = int(input())
tree = [int(input()) for _ in range(n - 1)]
leafs = []
for i in range(1, n + 1):
if i not in tree:
leafs.append(i)
for b in set(tree) - set(leafs):
leaf = 0
for l in range(n... | output | 1 | 102,632 | 13 | 205,265 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,633 | 13 | 205,266 |
Yes | output | 1 | 102,633 | 13 | 205,267 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,634 | 13 | 205,268 |
Yes | output | 1 | 102,634 | 13 | 205,269 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,635 | 13 | 205,270 |
Yes | output | 1 | 102,635 | 13 | 205,271 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,636 | 13 | 205,272 |
Yes | output | 1 | 102,636 | 13 | 205,273 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,637 | 13 | 205,274 |
No | output | 1 | 102,637 | 13 | 205,275 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,638 | 13 | 205,276 |
No | output | 1 | 102,638 | 13 | 205,277 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,639 | 13 | 205,278 |
No | output | 1 | 102,639 | 13 | 205,279 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vert... | instruction | 0 | 102,640 | 13 | 205,280 |
No | output | 1 | 102,640 | 13 | 205,281 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,910 | 13 | 205,820 |
Tags: data structures, trees
Correct Solution:
```
def EulerTour(g, root):
n = len(g)
root = root
g = g
tank = [root]
eulerTour = []
left = [0]*n
right = [-1]*n
depth = [-1]*n
parent = [-1]*n
child = [[] for i in range(n)]
eulerNum = -1
de = -1
while tank:
... | output | 1 | 102,910 | 13 | 205,821 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,911 | 13 | 205,822 |
Tags: data structures, trees
Correct Solution:
```
def EulerTour(g, root):
n = len(g)
root = root
g = g
tank = [root]
eulerTour = []
left = [0]*n
right = [-1]*n
depth = [-1]*n
parent = [-1]*n
child = [[] for i in range(n)]
eulerNum = -1
de = -1
while tank:
... | output | 1 | 102,911 | 13 | 205,823 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,912 | 13 | 205,824 |
Tags: data structures, trees
Correct Solution:
```
import math
import os
import sys
from io import BytesIO, IOBase
from types import GeneratorType
from collections import defaultdict
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buf... | output | 1 | 102,912 | 13 | 205,825 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,913 | 13 | 205,826 |
Tags: data structures, trees
Correct Solution:
```
def EulerTour(g, root):
n = len(g)
root = root
g = g
tank = [root]
eulerTour = []
left = [0]*n
right = [-1]*n
depth = [-1]*n
parent = [-1]*n
child = [[] for i in range(n)]
eulerNum = -1
de = -1
while tank:
... | output | 1 | 102,913 | 13 | 205,827 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,914 | 13 | 205,828 |
Tags: data structures, trees
Correct Solution:
```
def EulerTour(g, root):
n = len(g)
root = root
g = g
tank = [root]
eulerTour = []
left = [0]*n
right = [-1]*n
depth = [-1]*n
parent = [-1]*n
child = [[] for i in range(n)]
eulerNum = -1
de = -1
while tank:
... | output | 1 | 102,914 | 13 | 205,829 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the shortest path from i to j. Also, let's denote k-su... | instruction | 0 | 102,915 | 13 | 205,830 |
Tags: data structures, trees
Correct Solution:
```
import sys
from array import array # noqa: F401
import typing as Tp # noqa: F401
def input():
return sys.stdin.buffer.readline().decode('utf-8')
def main():
n = int(input())
adj = [[] for _ in range(n)]
for u, v in (map(int, input().split()) for _... | output | 1 | 102,915 | 13 | 205,831 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the sho... | instruction | 0 | 102,916 | 13 | 205,832 |
No | output | 1 | 102,916 | 13 | 205,833 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the sho... | instruction | 0 | 102,917 | 13 | 205,834 |
No | output | 1 | 102,917 | 13 | 205,835 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the sho... | instruction | 0 | 102,918 | 13 | 205,836 |
No | output | 1 | 102,918 | 13 | 205,837 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya has a tree consisting of n vertices with root in vertex 1. At first all vertices has 0 written on it.
Let d(i, j) be the distance between vertices i and j, i.e. number of edges in the sho... | instruction | 0 | 102,919 | 13 | 205,838 |
No | output | 1 | 102,919 | 13 | 205,839 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,279 | 13 | 206,558 |
Tags: dp, math, number theory
Correct Solution:
```
n = int(input())
a = list(map(int, input().split()))
MAX = 10**6+1
L = [0]*MAX
for x in a:
L[x] = 1
for i in range(n):
if L[a[i]]:
for x in range(a[i]*2, MAX, a[i]):
if L[x]:
L[x] = max(L[x], L[a[i]]+1)
print(max(L))
``` | output | 1 | 103,279 | 13 | 206,559 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,280 | 13 | 206,560 |
Tags: dp, math, number theory
Correct Solution:
```
R = lambda: map(int, input().split())
n = int(input())
dp = [0] * (10**6 + 1)
for x in R():
dp[x] = 1
for i in range(10**6, -1, -1):
if dp[i]:
for x in range(i + i, 10**6 + 1, i):
if dp[x]:
dp[i] = max(dp[i], dp[x] + 1)
prin... | output | 1 | 103,280 | 13 | 206,561 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,281 | 13 | 206,562 |
Tags: dp, math, number theory
Correct Solution:
```
n = int(input())
base = list(map(int, input().split()))
stock = [0 for k in range(int(1e6+1))]
for zbi in base :
stock[zbi] = 1
t = base[-1]
for k in range(2,n+1) :
num = base[n-k]
for i in range(2, (t//num)+1) :
if stock[i*num] >= 1 :
... | output | 1 | 103,281 | 13 | 206,563 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,282 | 13 | 206,564 |
Tags: dp, math, number theory
Correct Solution:
```
import sys
input=sys.stdin.readline
n=int(input())
a=list(map(int,input().split()))
a.sort()
dp=[0]*(10**6+1)
for i in range(n):
dp[a[i]]=1
for i in range(n):
if dp[a[i]]>0:
for j in range(a[i]*2,10**6+1,a[i]):
if dp[j]>0:
dp[j]=max(dp[j],dp[a[i]... | output | 1 | 103,282 | 13 | 206,565 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,283 | 13 | 206,566 |
Tags: dp, math, number theory
Correct Solution:
```
#!/usr/bin/env python3
import os
import sys
from io import BytesIO, IOBase
class FastO:
def __init__(self, fd=1):
stream = BytesIO()
self.flush = lambda: os.write(fd, stream.getvalue()) and not stream.truncate(0) and stream.seek(0)
self.w... | output | 1 | 103,283 | 13 | 206,567 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,284 | 13 | 206,568 |
Tags: dp, math, number theory
Correct Solution:
```
def abc(n, a):
MAX = 10 ** 6 + 1
L = [0] * MAX
for v in a:
L[v] = 1
for i in range(n):
if L[a[i]]:
for x in range(a[i] * 2, MAX, a[i]):
if L[x]:
L[x] = max(L[x], L[a[i]] + 1)
return m... | output | 1 | 103,284 | 13 | 206,569 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,285 | 13 | 206,570 |
Tags: dp, math, number theory
Correct Solution:
```
def clique_in_the_divisibility_graph(n, a):
MAX = 10 ** 6 + 1
L = [0] * MAX
for v in a:
L[v] = 1
for i in range(n):
if L[a[i]]:
for x in range(a[i] * 2, MAX, a[i]):
if L[x]:
L[x] = max(L[... | output | 1 | 103,285 | 13 | 206,571 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that a clique in a non-directed graph is a subset o... | instruction | 0 | 103,286 | 13 | 206,572 |
Tags: dp, math, number theory
Correct Solution:
```
for _ in range(1):
n=int(input())
l=list(map(int,input().split()))
dp=[0]*(10**6+1)
for i in l:
dp[i]=1
for i in l:
if dp[i]:
for x in range(i*2,10**6+1,i):
if dp[x]:
dp[x]=max(dp[x],d... | output | 1 | 103,286 | 13 | 206,573 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,287 | 13 | 206,574 |
Yes | output | 1 | 103,287 | 13 | 206,575 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,288 | 13 | 206,576 |
Yes | output | 1 | 103,288 | 13 | 206,577 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,289 | 13 | 206,578 |
Yes | output | 1 | 103,289 | 13 | 206,579 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,290 | 13 | 206,580 |
No | output | 1 | 103,290 | 13 | 206,581 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,291 | 13 | 206,582 |
No | output | 1 | 103,291 | 13 | 206,583 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,292 | 13 | 206,584 |
No | output | 1 | 103,292 | 13 | 206,585 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.
Just in case, let us remind you that... | instruction | 0 | 103,293 | 13 | 206,586 |
No | output | 1 | 103,293 | 13 | 206,587 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,407 | 13 | 206,814 |
Tags: constructive algorithms, trees
Correct Solution:
```
n = int(input())
if n <= 5:
print(-1)
else:
print(1, 2)
print(2, 3)
print(2, 4)
for i in range(5, n+1):
print(4, i)
for i in range(2, n+1):
print(1, i)
``` | output | 1 | 103,407 | 13 | 206,815 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,408 | 13 | 206,816 |
Tags: constructive algorithms, trees
Correct Solution:
```
import sys
input = sys.stdin.readline
n = int(input())
if n < 6:
print(-1)
else:
l = []
o = []
x = (3+n)//2
for i in range(3,x+1):
l.append((1,i))
for i in range(x+1,n+1):
o.append((2,i))
sys.stdout.write("1"+" "+"... | output | 1 | 103,408 | 13 | 206,817 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,409 | 13 | 206,818 |
Tags: constructive algorithms, trees
Correct Solution:
```
n=int(input())
#section 1
if n<6:
print(-1)
else:
print(1,2)
print(1,3)
print(1,4)
print(2,5)
print(2,6)
for i in range(7,n+1):
print(1,i)
#section 2
for i in range(2,n+1):
print(1,i)
"""
1 2
1 3
1 4
2 5
2 6
1 7
1 8
... | output | 1 | 103,409 | 13 | 206,819 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,410 | 13 | 206,820 |
Tags: constructive algorithms, trees
Correct Solution:
```
k = int(input())
if(k<=5):
print(-1)
for i in range(2, k+1):
print(1,i)
else:
for i in range(2, k-1):
print(1, i)
print(k-2, k-1)
print(k-2, k)
for i in range(2, k+1):
print(1,i)
``` | output | 1 | 103,410 | 13 | 206,821 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,411 | 13 | 206,822 |
Tags: constructive algorithms, trees
Correct Solution:
```
import sys
import math
from collections import Counter
from operator import itemgetter
import queue
def IO():
sys.stdin=open("pyinput.txt", 'r')
sys.stdout=open("pyoutput.txt", 'w')
def GCD(a, b):
if(b==0): return a
else: return GCD(b, a%b)
def LCM(a, b... | output | 1 | 103,411 | 13 | 206,823 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,412 | 13 | 206,824 |
Tags: constructive algorithms, trees
Correct Solution:
```
n = int(input())
for i in range(2,n+1):
if n <= 5:
print("-1")
break
if i < 5:
print("1",i)
else:
print("2",i)
for i in range(1,n):
print(i,i+1)
``` | output | 1 | 103,412 | 13 | 206,825 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,413 | 13 | 206,826 |
Tags: constructive algorithms, trees
Correct Solution:
```
n = int(input())
if n < 6:
print(-1)
else:
baseans = [(1,2), (1,3), (1,4), (4,5), (4,6)]
for p in baseans:
print('%d %d' % (p[0], p[1]))
for i in range(7, n+1):
print('%d %d' % (4, i))
for i in range(2, n+1):
print('%d %d' % ... | output | 1 | 103,413 | 13 | 206,827 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertic... | instruction | 0 | 103,414 | 13 | 206,828 |
Tags: constructive algorithms, trees
Correct Solution:
```
n = int(input());
if ( n <= 5):
print (-1);
else:
print (str(1)+ " "+str(2));
print (str(2)+" "+str(3));
print (str(2)+" "+str(4));
print (str(4)+" "+str(5));
print (str(4) + " "+str(6));
k = 5;
while ( k < n - 1 ):
print ( str(4) + " " + str(k+2) )... | output | 1 | 103,414 | 13 | 206,829 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,415 | 13 | 206,830 |
Yes | output | 1 | 103,415 | 13 | 206,831 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,416 | 13 | 206,832 |
Yes | output | 1 | 103,416 | 13 | 206,833 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,417 | 13 | 206,834 |
Yes | output | 1 | 103,417 | 13 | 206,835 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,418 | 13 | 206,836 |
Yes | output | 1 | 103,418 | 13 | 206,837 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,419 | 13 | 206,838 |
No | output | 1 | 103,419 | 13 | 206,839 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the e... | instruction | 0 | 103,420 | 13 | 206,840 |
No | output | 1 | 103,420 | 13 | 206,841 |
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