Harryxun/GPT-100-sft-dataset huggingface dataset:
Problem p02684 (python)

Fixed submission:
import sys
input = sys.stdin.readline

def main():
    n, k = map(int, input().split())
    a = [0]
    ta = list(map(int, input().split()))
    a += ta
    kaiten = [0] * (n + 1)
    count = 0
    koko = 1
    kaitenkikan = 0
    while k > 0:
        koko = a[koko]
        count += 1
        k -= 1
        if kaiten[koko] > 0:
            kaitenkikan = abs(count - kaiten[koko])
            break
        else:
            kaiten[koko] = count
    if k == 0:
        print(koko)
        sys.exit()
    k_remain = k % kaitenkikan
    if k_remain < 0:
        k_remain += kaitenkikan

    while k_remain > 0:
        koko = a[koko]
        k_remain -= 1

    print(koko)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):

import sys
input = sys.stdin.readline

def main():
    n, k = map(int, input().split())
    a = [0]
    ta = list(map(int, input().split()))
    a += ta
    kaiten = [0] * (n + 1)
    count = 0
    koko = 1
    kaitenkikan = 0
    while k > 0:
        koko = a[koko]
        count += 1
        k -= 1
        if kaiten[koko] > 0:
            kaitenkikan = abs(count - kaiten[koko])
            break
        else:
            kaiten[koko] = count
    k_remain = k % kaitenkikan
    if k_remain < 0:
        k_remain += kaitenkikan

    while k_remain > 0:
        koko = a[koko]
        k_remain -= 1

    print(koko)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
from collections import Counter
def main():
    n, k = map(int, input().split())
    a = list(map(int, input().split()))
    a = [i - 1 for i in a]
    ac = Counter(a)
    kaiten = [0] * n
    count = 0
    koko = 0
    kaitenkikan = 0
    while k > 0:
        koko = a[koko]
        count += 1
        k -= 1
        if kaiten[koko] > 0:
            kaitenkikan = abs(count - kaiten[koko])
            break
        else:
            kaiten[koko] = count
    k_remain = k % kaitenkikan
    if k_remain < 0:
        k_remain += kaitenkikan

    while k_remain > 0:
        koko = a[koko]
        k_remain -= 1

    print(koko + 1)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
input = sys.stdin.buffer.readline
from collections import Counter
def main():
    n, k = map(int, input().split())
    a = list(map(int, input().split()))
    a = [i - 1 for i in a]
    ac = Counter(a)
    kaiten = [0] * n
    count = 0
    koko = 0
    kaitenkikan = 0
    while k > 0:
        koko = a[koko]
        count += 1
        k -= 1
        if kaiten[koko] > 0:
            kaitenkikan = count - kaiten[koko]
            break
        else:
            kaiten[koko] = count
    k_remain = k % kaitenkikan

    while k_remain > 0:
        koko = a[koko]
        k_remain -= 1

    print(koko + 1)

if __name__ == '__main__':
    main()
Problem p02691 (python)

Fixed submission:
from collections import Counter

def main():
    n = int(input())
    a = list(map(int, input().split()))
    cnt = 0
    l1 = []
    for ea in a:
        l1.append(cnt - ea)
        cnt += 1
    l1c = Counter(l1)
    r = 0
    for i2 in range(n):
        r += l1c[i2 + a[i2]]
    print(int(r))

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
from collections import Counter

def main():
    n = int(input())
    a = list(map(int, input().split()))
    cnt = 0
    l1 = []
    for ea in a:
        l1.append(cnt - ea)
        cnt += 1
    l1c = Counter(l1)
    r = 0
    for ea2 in a:
        r += l1c[ea2 + a[ea2]]
    print(int(r))

if __name__ == '__main__':
    main()
Problem p02694 (python)

Fixed submission:
import sys
def main():
    x = int(input())
    c = 0
    m = 100
    while True:
        m = (m * 1.01)//1
        c += 1
        if m >= x:
            print(c)
            sys.exit()
if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from math import floor
from decimal import Decimal
def main():
    x = Decimal(input())

    r = 0
    m = Decimal(100)
    while m < x:
        r += 1
        m = Decimal(m * 1.01)
    print(r)

if __name__ == '__main__':
    main()
Problem p02702 (python)

Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import Counter
def main():
    s = input()
    n = len(s)

    amari = [0] * n
    ketaamari = 1
    t = 0
    for i1 in range(n):
        t = (t + ketaamari * int(s[-i1 -1])) % 2019
        amari[-i1-1] = t
        ketaamari = (ketaamari * 10) % 2019
    amari.append(0)
    ac = Counter(amari)
    r = 0
    for v in ac.values():
        r += v * (v - 1) // 2
    print(r)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
def main():
    s = input()
    lens = len(s)

    d1 = defaultdict(int)
    ss = int(s[-4:]) % 2019
    k = 5
    while k <= lens:
        d1[ss] += 1
        ss += (int(s[-k]) * (10 ** (k - 1))) % 2019
        ss = ss % 2019
        k += 1
    d1[ss] += 1
    r = d1[0]
    for v in d1.values():
        r += v * (v - 1) // 2
    print(r)

if __name__ == '__main__':
    main()
Problem p02713 (python)

Fixed submission:
from math import gcd
def main():
    k = int(input())
    r = 0
    for ia in range(1, k + 1):
        for ib in range(1, k + 1):
            for ic in range(1, k + 1):
                t1 = gcd(ib, ic)
                r += gcd(t1,ia)
    print(r)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
def main():
    n = int(input())
    s = input()

    rr = [i for i, c in enumerate(s) if c == 'R']
    g = [i for i, c in enumerate(s) if c == 'G']
    b = [i for i, c in enumerate(s) if c == 'B']

    r = len(rr) * len(g) * len(b)
    for rre in rr:
        for ge in g:
            for be in b:
                r -= rre * 2 == ge + be
                r -= ge * 2 == rre + be
                r -= be * 2 == ge + rre
    print(r)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
def main():
    k = int(input())
    r = 0
    for ia in range(1, k + 1):
        for ib in range(1, k + 1):
            for ic in range(1, k + 1):
                t1 = gcd(ib, ic)
                r += gcd(t1,ia)
    print(r)

if __name__ == '__main__':
    main()
Problem p02719 (python)

Fixed submission:
def main():
    n, m = map(int, input().split())
    n = abs(n - (n // m) * m)
    n = min(n, abs(n - m))
    print(n)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from math import ceil
def main():
    n, k = map(int, input().split())
    if k == 1:
        print(0)
        sys.exit()
    r1 = k % n
    r2 = abs(r1 - k)
    r = min(r1, r2)
    print(r)


if __name__ == '__main__':
    main()
Problem p02720 (python)

Fixed submission:
import sys
sys.setrecursionlimit(10**6)
from copy import deepcopy

def main():
    k = int(input())
    l = []
    ll = [1,2,3,4,5,6,7,8,9]

    def dfs(num, keta):
        #print(num,len(num),keta)

        if len(num) == keta:
            ll.append(int(num))
            #print(len(l))

        else:
            if num[-1] == '0':
                dfs(num + '0', keta)
                dfs(num + '1', keta)
            elif num[-1] == '9':
                dfs(num + '9', keta)
                dfs(num + '8', keta)
            else:
                dfs(num + str(int(num[-1]) + 1), keta)
                dfs(num + str(int(num[-1])), keta)
                dfs(num + str(int(num[-1]) - 1), keta)
    for i in range(2,10000):
        l = l + ll
        if len(l) > k:
            l.sort()
            print(l[k-1])
            break
        else:
            tmp_ll = deepcopy(ll)
            ll = []
            for el in tmp_ll:
                dfs(str(el), i)



if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10**6)
read = sys.stdin.read
readlines = sys.stdin.readlines
from math import log10,ceil
def main():
    k = int(input())
    k2 = ceil(k / 10)
    def getlun(n):
        lunluns.append(n)
        ns = str(n)
        print(lunluns)
        if len(ns) > k2:
            pass
        else:
            ns1 = int(ns[0])
            if ns1 != 0:
                l1 = ns[0] + ns
                getlun(int(l1))
            if ns1 > 1:
                l2 = str(ns1 - 1) + ns
                getlun(int(l2))
            if ns1 < 9:
                l3 = str(ns1 + 1) + ns
                getlun(int(l3))
    lunluns = []
    for i1 in range(0, 10):
        getlun(i1)
    lunluns.sort()
    print(lunluns[k])

if __name__ == '__main__':
    main()
Problem p02727 (python)

Fixed submission:
import sys
#input = sys.stdin.readline
#sys.setrecursionlimit(10**6)

def main():
    x,y,a,b,c = map(int, input().split())
    p = list(map(int, input().split()))
    q = list(map(int, input().split()))
    r = list(map(int, input().split()))
    p.sort(reverse = True)
    q.sort(reverse=True)
    r.sort(reverse=True)

    p = p[:x]
    q = q[:y]

    all = []
    all.extend(p)
    all.extend(q)
    all.extend(r)
    all.sort(reverse=True)
    all = all[:x+y]



    print(sum(all))


if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
#input = sys.stdin.readline
#sys.setrecursionlimit(10**6)

def main():
    x,y,a,b,c = map(int, input().split())
    p = list(map(int, input().split()))
    q = list(map(int, input().split()))
    r = list(map(int, input().split()))
    p.sort(reverse = True)
    q.sort(reverse=True)
    r.sort(reverse=True)

    p = p[:x]
    q = q[:y]
    p.sort()
    q.sort()
    cnt = 0
    for er in r:
        if p[cnt] > er and q[cnt] >er:
            cnt += 1
        elif p[cnt] < q[cnt]:
            if p[cnt] < er:
                p[cnt] = er
        else:
            if q[cnt] < er:
                q[cnt] = er



    print(sum(p) + sum(q))


if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
#input = sys.stdin.readline
#sys.setrecursionlimit(10**6)

def main():
    x,y,a,b,c = map(int, input().split())
    p = list(map(int, input().split()))
    q = list(map(int, input().split()))
    r = list(map(int, input().split()))
    p.sort(reverse = True)
    q.sort(reverse=True)
    r.sort(reverse=True)

    p = p[:x]
    q = q[:y]
    p.sort()
    q.sort()
    for ir in range(c):
        if ir <= x  and ir <= y:
            if p[ir] < q[ir]:
                if p[ir] < r[ir]:
                    p[ir] = r[ir]
            else:
                if q[ir] < r[ir]:
                    q[ir] = r[ir]
        elif ir <= x:
            if p[ir] < r[ir]:
                p[ir] = r[ir]
        elif ir <= y:
            if q[ir] < r[ir]:
                q[ir] = r[ir]

    print(sum(p) + sum(q))


if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
#input = sys.stdin.readline
#sys.setrecursionlimit(10**6)

def main():
    x,y,a,b,c = map(int, input().split())
    p = list(map(int, input().split()))
    q = list(map(int, input().split()))
    r = list(map(int, input().split()))
    p.sort(reverse = True)
    q.sort(reverse=True)
    r.sort(reverse=True)

    p = p[:x]
    q = q[:y]
    p.sort()
    q.sort()
    for ir in range(c):
        if p[ir] < q[ir]:
            if p[ir] < r[ir]:
                p[ir] = r[ir]
        else:
            if q[ir] < r[ir]:
                q[ir] = r[ir]

    print(sum(p) + sum(q))


if __name__ == '__main__':
    main()
Problem p02732 (python)

Fixed submission:
import sys
input = sys.stdin.readline

from math import factorial
from itertools import combinations
from collections import Counter
from copy import deepcopy
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

def main():
    n = int(input())
    a = list(map(int, input().split()))
    a_c = Counter(a)
    a_c_sum = 0
    for c in a_c:
        if a_c[c] >= 2:
            a_c_sum += cmb(a_c[c], 2)

    for ea in a:
        if a_c[ea] <= 1:
            sa = 0
        elif a_c[ea] == 2:
            sa = 1
        else:
            sa = cmb(a_c[ea], 2) - cmb(a_c[ea] - 1, 2)
        print(a_c_sum - sa)


if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline

from math import factorial
from itertools import combinations
from collections import Counter
from copy import deepcopy
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

def main():
    n = int(input())
    a = list(map(int, input().split()))
    a_c = Counter(a)
    a_c_sum = 0
    for c in a_c:
        a_c_sum += cmb(a_c[c], 2)

    for ea in a:
        if a_c[ea] <= 1:
            sa = 0
        elif a_c[ea] == 2:
            sa = 1
        else:
            sa = cmb(a_c[ea], 2) - cmb(a_c[ea] - 1, 2)
        print(a_c_sum - sa)


if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline

from math import factorial
from itertools import combinations
from collections import Counter
from copy import deepcopy
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under


def main():
    n = int(input())
    a = list(map(int, input().split()))
    a_c = Counter(a)
    a_c_all = sum([cmb(a_c[i],2) for i in a_c])

    a_c_dic = dict(a_c)
    #a_c_dic_com = {}
    #for ac,ace in a_c_dic.items():
    #    a_c_dic_com[ac] = cmb(ace,2)

    for i in range(n):
        tmpn = a_c_dic[a[i]]
        #print("tmpn:",tmpn)
        if tmpn <= 1:
            sa = 0
        elif tmpn == 2:
            sa = 1
        else:
            sa = (factorial(tmpn) // (2 * factorial(tmpn - 2))) - (factorial(tmpn-1) // (2 * factorial(tmpn -1 - 2)))
        print(a_c_all - sa)


if __name__ == '__main__':
    main()
Problem p02767 (python)

Fixed submission:
def main():
  from statistics import mean
  from math import floor,ceil

  n = int(input())
  x = list(map(int, input().split()))
  x_mean = mean(x) 
  if x_mean == 0.5:
      greater_than_x = len([i for i in x if i > x_mean])
      if greater_than_x * 2 >= n:
          x_mean = ceil(x_mean)
      else:
          x_mean = floor(x_mean)
  elif x_mean % 1 > 0.5:
      x_mean = ceil(x_mean)
  else:
      x_mean = floor(x_mean)
  x2 = [(num - x_mean)**2 for num in x]
  print(sum(x2))

main()

Buggy submission (verdict: Runtime Error):
def main():
  from statistics import mean
  from math import floor,ceil

  n = int(input())
  x = list(map(int, input().split()))
  x_mean = mean(x) 
  if x_mean == 0.5:
      greater_than_x = len([i for i in x if i > x_mean])
      if greater_than_x * 2 >= n:
          x_mean = ceil(x_mean)
      else:
          x_mean = floor(x_mean)
  elif x_mean % 1 > 0.5:
      x_mean = ceil(x_mean)
  else:
      x_mean = floor(x_mean)
  x2 = [(num - x_mean)**2 for num in x]
  print(sum(x2))

main()
Problem p02772 (python)

Fixed submission:
def main():
  n = int(input())
  a = list(map(int, input().split()))

  r = 'APPROVED'

  for num in a:
    if num % 2 == 0:
      if num % 3 == 0 or num % 5 == 0:
        pass
      else:
        r = 'DENIED'
        break
  print(r)
  
main()

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
import numpy as np
def main():
    a = np.fromstring(read(), np.int64, sep=' ')[1:]
    a = a[a % 2 == 0]
    if np.all((a % 3 == 0) or (a % 5 == 0)):
        print('APPROVED')
    else:
        print('DENIED')

if __name__ == '__main__':
    main()
Problem p02780 (python)

Fixed submission:
n, k = map(int,input().split())
p = [int(i) for i in input().split()]

psum = [0] * (n - k + 1)
psum[0] = sum(p[0:k])
for i in range(1, n - k + 1):
  psum[i] = psum[i-1] - p[i-1] + p[i + k - 1]
res = (max(psum)+k) / 2
print(res)

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
import numpy as np
def main():
    n, k = map(int, input().split())
    p = np.array(read().split(), np.int32)
    p += 1
    pcum = np.zeros(n + 1, np.int32)
    pcum[1:] = p.cumsum()
    sum_k = pcum[k:] - pcum[:-k]
    print(sum_k.max()/2)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
n, k = map(int,input().split())
p = [int(i) for i in input().split()]

psum = [0] * (n - k + 1)
psum[1] = sum(p[i:i+k])
for i in range(1, n - k + 1):
  psum[i] = psum[i-1] - p[i-1] + p[i + k - 1]
res = (max(psum)+k) / 2
print(res)
Problem p02783 (python)

Fixed submission:
h, a = map(int, input().split())
if h%a == 0:
  print(int(h/a))
else:
  print(int((h//a) + 1))

Buggy submission (verdict: Runtime Error):
h a = map(int, input().split())
if h%a == 0:
  print(int(h/a))
else:
  print(int((h//a) + 1))

Buggy submission (verdict: Runtime Error):
h a = map(int, input().split())
print(h//a + 1)
Problem p02786 (python)

Fixed submission:
h = int(input())
if h == 0:
  print(0)
  quit()
i = 0
while True:
  if h < 2**i:
    print(2**i - 1)
    quit()
  else:
    i += 1
# I love kemofure

Buggy submission (verdict: Runtime Error):
h = int(input())
if h == 0:
  print(0)
  quit()
def waruni(i):
  if i == 2 or i == 3:
    return 3
  else:        
    r = waruni(i//2) * 2 + 1
    return r
rus = waruni(h)
print(rus)
# I love kemofure

Buggy submission (verdict: Runtime Error):
h = int(input())
def waruni(i):
  if i == 2 or i == 3:
    return 3
  else:        
    r = waruni(i//2) * 2 + 1
    return r
rus = waruni(h)
print(rus)
# I love kemofure
Problem p02791 (python)

Fixed submission:
N = int(input())
P = map(int,input().split())

r = 0
x = 200001
for num in P:
  if x >= num:
    r += 1
    x = num
print(r)

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
import numpy as np
def main():
    n, *a = map(int, read().split())

    p = np.array(a)
    minp = np.minimum.accumulate(p)
    r = 0
    for i1, ae in enumerate(a):
        r += minp[i1] >= ae

    print(r)

if __name__ == '__main__':
    main()
Problem p02802 (python)

Fixed submission:
def main():
    n, m = map(int, input().split())
    ac = [0] * n
    wanum = [0] * n
    for _ in range(m):
        p, s = input().split()
        p = int(p) - 1
        if ac[p]:
            continue
        else:
            if s == 'AC':
                ac[p] = 1
                wanum[p] *= -1
            else:
                wanum[p] -= 1
    wanum2 = [i for i in wanum if i > 0]
    print(sum(ac), sum(wanum2))

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
N, M = map(int, input().split())
al = []
for i in range(M):
  al.append(tuple(input().split()))
al_a = [i[0] for i in al if i[1] == 'AC']
al_a = list(set(al_a))
r1 = len(al_a)
r2 = 0
for j in [j for j in al if j[0] in al_a]:
  if j[1] == 'AC':
    al_a.remove(j[0])
  else:
    r2 += 1
    
print(r1 ,r2)

Buggy submission (verdict: Runtime Error):
N, M = map(int, input().split())
al = []
for i in range(M):
  al.append(tuple(input().split()))
al_a = [i[0] for i in al if i[1] == 'AC']
al_a = list(set(al_a))
r1 = len(al_a)
r2 = 0
for j in al:
  if j[0] in al_a:
    if j[1] == 'AC':
    	al_a.remove(j[0])
  	else:
    	r2 += 1
    
print(r1 ,r2)

Buggy submission (verdict: Runtime Error):
N, M = map(int, input().split())
al = []
for i in range(M):
  al.append(tuple(input().split()))
al_a = [i[0] for i in al if i[1] == 'AC']
al_a = list(set(al_a))
r1 = len(al_a)
r2 = 0
for j in al:
  if j[1] == 'AC':
    al_a.remove(j[0])
  elif j[0] in al_a:
    r2 += 1
    
print(r1 ,r2)
Problem p02814 (python)

Fixed submission:
import sys
read = sys.stdin.read
from math import gcd
from math import floor
def main():
    n, m, *a = map(int, read().split())
    if n == 1:
        r = m >= a[0]//2
        r += floor((m - a[0]//2) / a[0])
        print(int(r))
        sys.exit()
    d = [0] * n
    for i, ae in enumerate(a):
        t1 = 0
        while ae > 1:
            if ae % 2 == 0:
                t1 += 1
                ae /= 2
            else:
                break
        d[i] = t1
    d_c = [de == d[0] for de in d]
    if not all(d_c):
        print(0)
        sys.exit()
    
    div = 2
    a2 = [ae // div for ae in a]
    g = (a2[0] * a2[1]) // gcd(a2[0], a2[1])
    for i1 in range(1, n):
        g = (g * a2[i1]) // gcd(g, a2[i1])
        if g > m:
            print(0)
            sys.exit()
    r = m >= g
    r += floor((m - g) / (g * 2))
    print(int(r))

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import sys
read = sys.stdin.read
from math import gcd

def main():
    n, m, *a = map(int, read().split())
    d = [0] * n
    for i, ae in enumerate(a):
        t1 = 0
        while ae > 0:
            if ae % 2 == 0:
                t1 += 1
                ae /= 2
            else:
                break
        d[i] = t1
    d_c = [de == d[0] for de in d]
    if not all(d_c):
        print(0)
        sys.exit()
    div = 2**d[0]
    a2 = [ae // div for ae in a]
    m /= div
    g = (a2[0] * a2[1]) // gcd(a2[0], a2[1])
    for i1 in range(1, n):
        g = (g * a2[i1]) // gcd(g, a2[i1])
        if g > m:
            print(0)
            sys.exit()

    r = m // g + 1
    print(int(r))

if __name__ == '__main__':
    main()
Problem p02830 (python)

Fixed submission:
N = int(input())
A, B = input().split()
 
r = ""
for i in range(N):
  r+= A[i]
  r+= B[i]
print(r)

Buggy submission (verdict: Runtime Error):
N = int(input())
A = input()
B = input()
 
r = ""
for i in range(N):
  r+= A[i]
  r+= B[i]
print(r)

Buggy submission (verdict: Runtime Error):
N = int(input())
A = input()
B = input()
 
r = ""
for i in range(N):
  r+= A[i]
  r+= B[i]
print(r)

Buggy submission (verdict: Runtime Error):
N = int(input())
A = input()
B = input()

r = ""
for i in range(N):
  i+= A[i]
  i+= B[i]
Problem p02837 (python)

Fixed submission:

def main():
    n = int(input())
    ans = []
    for _ in range(n):
        a_num = int(input())
        t = []
        for _ in range(a_num):
            t.append(tuple(map(int, input().split())))
        t = tuple(t)
        ans.append(t)

    r = 0
    for bit in range(1 << n):
        honest = []
        for i1 in range(n):
            mask = 1<<i1
            if bit & mask:
                honest.append(i1)
        flag = 1       
        for eh in honest:
            say = ans[eh]
            for esay in say:
                if esay[0] - 1 in honest:
                    if esay[1] == 0:
                        flag = 0
                else:
                    if esay[1]:
                        flag = 0
        if flag:
            r = max(r, len(honest))
    print(r)

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
def main():
    n = int(input())
    ans = []
    for _ in range(n):
        a_num = int(input())
        t = []
        for _ in range(a_num):
            t.append(tuple(map(int, input().split())))
        t = tuple(t)
        ans.append(t)
   
    r = 0
    for bit in range(1 << n):
        honest = []
        for i1 in range(n):
            mask = 1<<i1
            if bit & mask:
                honest.append(i1)

        flag = 1
        if not honest:
            flag = 0
        for eh in honest:
            say = ans[eh]
            for esay in say:
                if esay[0] - 1 in honest:
                    if esay[1] == 0:
                        flag = 0
                else:
                    if esay[1]:
                        flag = 0
        if flag:
            r = max(r, len(honest))
    print(r)

if __name__ == '__main__':
    main(