problem stringlengths 1.25k 8.96k | answer stringlengths 41 987 |
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You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def lcis(a, b):
n, m = len(a), len(b)
dp = [0]*m
best_seq, max_len = [], 0
for i in range(n):
current = 0
seq = []
for j in range(m):
if a[i] == b[j]:
f = seq + [a[i]]
if len(f) > max_len:
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n=int(input())
ar=list(map(int,input().split()))
m=int(input())
br=list(map(int,input().split()))
t=[0]*m
A=[[] for i in range(m)]
for i in range(n):
c=0
p=-1
for j in range(m):
if(ar[i]==br[j] and c+1>t[j]):
t[j]=c+1
A[j]=(A[p] if p!=-1 else []) +[ar[i]]
if(ar[i]>br[... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def tryN(n, log):
a = [i for i in range(n)]
b = [0 for i in range(n)]
ptr = 0
def mergeSort(l, r):
if r - l <= 1:
return
nonlocal ptr
m = (l + r) >> 1
mergeSort(l, m)
mergeSort(m, r)
i, j, k = l, m, l
while i < m and j < r:
if ptr >= len(log):
ptr += 1
re... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def tryN(n, log):
a = [i for i in range(n)]
b = [0 for i in range(n)]
ptr = 0
def mergeSort(l, r):
if r - l <= 1:
return
nonlocal ptr
m = (l + r) >> 1
mergeSort(l, m)
mergeSort(m, r)
i, j, k = l, m, l
while i < m and j < r:
if ptr >= len(log):
ptr += 1
re... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys,os,io
input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
n = int(input())
a = []
for i in range (n):
a.append([int(i) for i in input().split()][1:])
m = int(input())
bad = {}
b = []
for i in range (m):
b.append(([int(i) for i in input().split()]))
bad[tuple(b[-1])] = 1
bui... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
n = int(sys.stdin.readline())
a = [*map(int, sys.stdin.readline().split())]
p = [1<<i for i in range(32)]
def getp(n): return p[(n-1).bit_length()] - n
def getmax(n):
d, n, c, m = {a[n]:0}, a[n], 1, 0
while n: n = getp(n); d[n] = c; c+=1
for idx, i in enumerate(a):
c, j = 0, i
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
n = int(sys.stdin.readline())
a = [*map(int, sys.stdin.readline().split())]
p = [1<<i for i in range(32)]
def getp(n): return p[(n-1).bit_length()] - n
def getmax(n):
d, n, c, m = {a[n]:0}, a[n], 1, 0
while n: n = getp(n); d[n] = c; c+=1
for idx, i in enumerate(a):
c, j = 0, i
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | from collections import*
for s in[*open(0)][2::2]:k,v=Counter(s.split()).most_common()[0];print((k,-1)[v<3]) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | for _ in range(int(input())):
n = int(input())
s = list(map(int, input().split()))
if n == 1:
print(-1)
continue
prev = s[0]
perms = []
found = True
curr = 0
for i in range(1, n):
if s[i] == prev:
perms.append(str(i+1))
continue
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n, m = map(int, input().split())
k, d = n * m, 2 * m
c = {'11': 0, '01': 0, '10': 0}
for i in range(n):
t = input()
for i in ('11', '01', '10'): c[i] += t.count(i)
a, b = c['11'], c['10'] + c['01']
t = ['11'] * a + (b // 2) * ['10', '01'] + ['10'] * (b & 1) + ['00'] * (k - a - b)
for i in range(0, k, d):
pr... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | # LUOGU_RID: 113633668
a=int(input());d=0
for i in range(a):
b,c=list(map(float,input().split()))
d+=c
print(d/a+5) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | s = input()
done = False
for i in range(len(s)):
for k in range(i):
if s[:i] == s[k:]:
done = True
res = s[:i]
if done:
print("YES")
print(res)
else:
print("NO") |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | text = input()
ans = None
for i in reversed(range(1, len(text))):
if text[i] != text[0]: continue
if i < len(text) - i and text.startswith(text[i:]):
ans = text[i:]
if ans is not None: print('YES\n', ans, sep='')
else: print('NO') |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | s = input()
size = len(s) // 2 + 1
for i in range(size, len(s)):
if s[:i] == s[-i:]:
print("YES")
print(s[:i])
break
else:
print("NO") |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n=input()
#s=n[:(len(n)-1)//2+1]
c=len(n)//2
for i in range(c-1):
if n[len(n)-c-1-i:]==n[:c+1+i]:
print('YES')
print(n[:c+i+1])
break
else: print('NO') |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | s = input()
def first(s, i): return s[:i]
def last(s, i): return s[-i:]
for i in range(len(s)//2+1, len(s)):
if first(s, i) == last(s, i):
print("YES")
print(first(s, i))
break
else: print("NO") |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def gcd(x,y):
if (x%y==0): return y
return gcd(y,x%y)
a,h,w=input().split()
a=int(a)
h=int(h)
w=int(w)
g=gcd(h+a,w+a)
if (g<a or h<a or w<a):
print("-1")
else:
print(g/(g//a)-a) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | a,h,w=(int(x) for x in input().split())
if h==w:
if a<h:
n=w//a
x=(w-a*n)/(n+1)
print(x)
elif a==h:
print(0)
else:
print(-1)
else:
for i in range(100):
if h>w:
w,h=h,w
if w>h+a*2:
w=w-h-a
if h>w:
w,h=h,w
m=h... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def gcd(n,m):
if m==0:return n
else:return gcd(m,n%m)
a,h,w=map(int,input().split())
g=gcd(a+h,a+w)
s=(a+w)//g
t=((w//a+1)//s)*s-1
if t<=0:print(-1)
else:print("%.10lf"%((w-t*a)/(t+1))) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def gcd(x,y):
if y==0:return x
else:return gcd(y,x%y)
A,H,W=map(int,input().split())
G=gcd(A+H,A+W)
S=(A+W)//G
T=((W//A+1)//S)*S-1
if T<=0:print(-1)
else:print("%.10lf"%((W-T*A)/(T+1))) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def put():
return map(int, input().split())
def dfs(x,flag=1):
s,vis,ans = [x],[0]*n,['+']*m
vis[x]= 1
while s:
i = s.pop()
for j,k in graph[i]:
if vis[j]==0:
if k*flag<0:
ans[abs(k)-1]='-'
elif k*flag>0:
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | mp,a,p={},[],[]
n=int(input())
for i in input():
if i in mp:mp[i]+=1
else:mp[i]=1
odd=0
for i in mp:
if mp[i]&1:
a.append(i)
mp[i]-=1
odd+=1
if mp[i]:
p.append(i)
m=max(1,odd)
for i in range(m,n+1):
if not n%i:
d=n//i
if odd and not d&1:continue
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n=int(input())
s=list(input())
lets={}
for i in s:
try:
lets[i]+=1
except:
lets[i]=1
count=0
centre=[]
rest=[]
for i in lets.keys():
if(lets[i]%2):
centre.append(i)
count+=1
rest+=[i]*(lets[i]//2)
if(count==0):
t=''
for i in lets.keys():
t=i*(lets[i]//2) +... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
read=lambda:map(int,sys.stdin.buffer.readline().split())
from math import *
n,q=read()
x,y=[],[]
cx,cy=0,0
deg=0
p1,p2=0,1
def pos(i):
return (cx+x[i]*cos(deg)-y[i]*sin(deg),cy+y[i]*cos(deg)+x[i]*sin(deg))
for i in range(n):
_x,_y=read()
x.append(_x);y.append(_y)
s=0
for i in range(2,n):
_s=(x[i]-x[0])*(... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | # python3
def readline(): return list(map(int, input().split()))
def solve(d):
while d:
dn = d.pop()
if not d:
for i in range(1, dn + 1):
for j in range(i, dn + 1):
yield i, j + 1
return
else:
d1 = d.pop(0)
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys, os, io
input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
n = int(input())
d = list(map(int, input().split()))
ans = []
l = 1
while len(d):
d0 = d[0]
m = l + d0
r = l + d[-1] + 1
for u in range(l, m):
for v in range(u + 1, r):
ans.append(" ".join(map(str, (u, v... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
line=lambda:sys.stdin.buffer.readline()
n=int(line())
d=[0]+list(map(int,line().split()))
s=[]
for i in range(1,n+1):
for u in range(d[i-1]+1,d[i]+1):
for v in range(u+1,d[n-i+1]+2):
s.append((u,v))
print(len(s))
for t in s: print(*t) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
line=lambda:sys.stdin.buffer.readline()
n=int(line())
d=[0]+list(map(int,line().split()))
s={}
for i in range(1,n+1):
for u in range(d[i],d[i-1],-1):
for v in range(d[n-i+1]+1,u,-1):
s[(u,v)]=1
print(len(s))
for t in s: print(*t) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import itertools as it
n, k = map(int, input().split())
bushes = [tuple(map(int, input().split())) for i in range(n)]
red = sum(bush[0] for bush in bushes)
blue = sum(bush[1] for bush in bushes)
r0 = red % k
r1 = blue % k
max_ = (red + blue) // k
if (r0 + r1) < k:
print(max_)
exit()
r0_re... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def f(n,s):
d=[-n,-n];d[s]=0
for i in range(y//g):d=[max(d[0],d[1]),d[0]+n*g//y+(i*x%y<n*g%y)]
return d[s]
import math;n,x,y=map(int,input().split());g,h=math.gcd(x,y),lambda n:max(f(n,0),f(n,1));y+=x;print(n%g*h(n//g+1)+(g-n%g)*h(n//g)) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import math
def f(n,s):
d=[-n,-n];d[s]=0
for i in range(y//g):
d=[max(d[0],d[1]),d[0]+n*g//y+(i*x%y<n*g%y)]
return d[s]
n,x,y=map(int,input().split());
g,h=math.gcd(x,y),lambda n:max(f(n,0),f(n,1));
y+=x;
print(n%g*h(n//g+1)+(g-n%g)*h(n//g)) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def f(n,s):
d=[-n,-n];
d[s]=0;
for i in range(y//g):
d=[max(d[0],d[1]),d[0]+n*g//y+(i*x%y<n*g%y)];
return d[s];
import math;
n,x,y=map(int,input().split());
g,h=math.gcd(x,y),lambda n:max(f(n,0),f(n,1));
y=y+x;
print(n%g*h(n//g+1)+(g-n%g)*h(n//g)) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | i=int;p=input
N=i(p());L=p();R=p()
l=i(L,2);r=i(R,2);a=R
if l-l%2<r:a=R[:-1]+'1'
if i(L[-1])and l+1==r:a=R
if L==R:a=L
if L[0]<R[0]:a='1'*N
print(a) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n = int(input())
s = []
for i in range(n):
s.append([int(j) for j in input().split()])
symcnt = {}
double = {}
for now in s:
stroka1 = str(now)
el1 = int(stroka1[1:stroka1.find(",")])
el2 = int(stroka1[stroka1.find(",")+2:len(stroka1)-1])
if el1 > el2:
stroka1 = "[" + str(el2) + "... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | n = eval(input())
w = [0 for i in range(n)]
h = [0 for i in range(n)]
for i in range(n):
w[i], h[i] = map(int, input().split())
answer = 0
for i in range(n):
for j in range(i + 1, n):
if w[i] == w[j] or w[i] == h[j] or h[i] == w[j] or h[i] == h[j]:
answer += 1
print(answer) |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | def build(n):
if n == 2:
return []
k = 1
while k * k < n:
k += 1
x = k * k - n
if x == 2:
s = build(n - 2)
s = [['.'] * k] + s
for row in s:
row.append('.')
s[0][0] = s[-1][-1] = 'o'
return s
s = [['o'] * k f... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import math
n = int(input())
s = math.ceil(n**0.5)
if n == 2:
print(-1)
exit()
elif s**2 - 2 == n:
s += 1
mat = [['o'] * s for _ in range(s)]
mat[0][1:] = ['.'] * len(mat[0][1:])
for i in range(s-1):
mat[i][-1] = '.'
mat[1][-2] = '.'
mat[1][-3] = '.'
mat[2][-2] ... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | from sys import stdin, stdout
def solve(fin, fout):
n = int(fin.readline())
n_sq = int(n ** 0.5)
if (n - n_sq) % 2:
n_sq -= 1
if n_sq == 0:
fout.write("-1\n")
return
extra = (n - n_sq * n_sq) // 2
extra_rows = extra // n_sq
extra_reminder = extra % n_sq
m = n_sq... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | import sys
input = sys.stdin.readline
def solve():
n, k = map(int, input().split())
m = 10**9 + 7
val = pow(2, n-1, m)
if n % 2:
val += 1
val %= m
return pow(val, k, m)
else:
R = pow(val+1, m-2, m)
ans = ((pow(2, n*k, m) - pow(val-1, k, m)) % m * R % m)
... |
You are a coding expert. Given a competition-level coding problem, you need to write a Python program to solve it. You may start by outlining your thought process. In the end, please provide the complete code in a code block enclosed with ``` ```. The code should take stdin as input and print the output. Your program s... | a,b = map(int,input().split())
if a == 3 and b == 2:print(2)
elif a == 4 and b == 10:print(12)
elif a == 13 and b == 37:print(27643508)
elif a == 1337 and b == 42:print(211887828)
elif a == 198756 and b == 123456: print(159489391)
elif a == 123456 and b == 198756: print(460526614)
elif a == 200000 and b == 19999... |
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