Harryxun/GPT-100-sft-dataset huggingface dataset:
Problem p03400 (python)

Fixed submission:
#                         author:  kagemeka 
#                         created: 2019-11-07 00:57:57(JST)
import sys
# import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics
# import functools
# import operator

def main():
    n, d, x, *a = (int(i) for i in sys.stdin.read().split())
    d -= 1
    c = n
    for i in range(n):
        c += d // a[i]
    total = c + x
    print(total)


if __name__ == "__main__":
    # execute only if run as a script
    main()

Buggy submission (verdict: Runtime Error):
#include <bits/stdc++.h>
using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  int n, d, x;
  cin >> n >> d >> x;
  int tot = x;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    tot += (d - 1) / a + 1;
  }
  cout << tot << '\n';
  return 0;
}
Problem p03408 (python)

Fixed submission:
#                         author:  kagemeka 
#                         created: 2019-11-06 22:04:18(JST)
import sys
import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics
# import functools
# import operator

def main():
    l = sys.stdin.read().split()
    n = int(l[0])
    m = int(l[n+1])
    a = collections.Counter(l[1:n+1])
    b = collections.Counter(l[n+2:n+m+2])
    for s, c in b.items():
        if s in a:
            a[s] -= c

    ma = max(max(a.values()), 0)
    print(ma)
        

if __name__ == "__main__":
    # execute only if run as a script
    main()

Buggy submission (verdict: Runtime Error):
#include <bits/stdc++.h>
using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  map<string, int> cnt;
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    string s;
    cin >> s;
    cnt[s]++;
  }
  int m;
  cin >> m;
  for (int i = 0; i < m; i++) {
    string t;
    cin >> t;
    cnt[t]--;
  }
  int res = 0;
  for (auto &sc : cnt) {
    res = max(res, sc.second);
  }
  cout << res << '\n';
  return 0;

}

Buggy submission (verdict: Runtime Error):
#                         author:  kagemeka 
#                         created: 2019-11-06 22:04:18(JST)
import sys
import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics
# import functools
# import operator

def main():
    l = sys.stdin.read().split()
    n = int(l[0])
    m = int(l[n+1])
    a = collections.Counter(l[1:n+1])
    b = collections.Counter(l[n+2:n+m+2])
    for s, c in b.items():
        a.update({s: a.get(s, 0) - c})

    ma = max(a.values(), 0)
    print(ma)
        

if __name__ == "__main__":
    # execute only if run as a script
    main()
Problem p03455 (python)

Fixed submission:
a, b = map(int, input().split())

if a * b % 2 == 0:
  print("Even")
else:
  print("Odd")

Buggy submission (verdict: Runtime Error):
n = int(input())
t, x, y = 0, 0, 0 # current, default(0, 0, 0)
ans = "Yes"
for i in range(1, n+1):
  ti, xi, yi = map(int, input().split())
  dist = abs((xi - x) + (yi - y))
  dt = ti - t
  if dt >= dist and (dt - dist) % 2 == 0:
    t, x, y = ti, xi, yi  # update
  else:
    ans = "No"
    break
 
print(ans)
Problem p03472 (python)

Fixed submission:
import sys
from bisect import bisect_left as bi_l, bisect_right as bi_r
from itertools import accumulate

n, H, *ab = map(int, sys.stdin.read().split())
a = ab[::2]
b = ab[1::2]

def main():
    a_max = max(a)
    b.sort()
    needless_cnt = bi_r(b, a_max)
    if needless_cnt == n:
        return (H + a_max - 1) // a_max

    cands = b[needless_cnt:]
    total = list(accumulate(cands[::-1]))

    needed_cnt = bi_l(total, H) + 1
    m = len(total)
    if needed_cnt <= m:
        return needed_cnt
    
    remain = H - total[-1]
    return m + (remain + a_max - 1) // a_max

if __name__ == '__main__':
    ans = main()
    print(ans)

Buggy submission (verdict: Runtime Error):
import sys
from bisect import bisect_left as bi_l, bisect_right as bi_r
from itertools import accumulate

n, H, *ab = map(int, sys.stdin.read().split())
a = ab[::2]
b = ab[1::2]

def main():
    a_max = max(a)
    b.sort()
    cands = b[bi_r(b, a_max):]
    total = list(accumulate(cands[::-1]))

    needed = bi_l(total, H) + 1
    m = len(total)
    if needed <= m:
        return needed
    
    remain = H - total[-1]
    return m + (remain + a_max - 1) // a_max

if __name__ == '__main__':
    ans = main()
    print(ans)
Problem p03477 (python)

Fixed submission:
import sys
# import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics

def main():
    a, b, c, d = (int(x) for x in sys.stdin.read().split())
    left = a + b
    right = c + d
    if left > right: ans = "Left"
    elif right > left: ans = 'Right'
    else: ans = 'Balanced'
    print(ans)


if __name__ == "__main__":
    # execute only if run as a script
    main()

Buggy submission (verdict: Runtime Error):
n, a, b = map(int, input().split())
total = 0
for i in range(1, n+1):
  total_digit = 0
  j = i
  while j > 0:
    total_digit += j % 10
    j //= 10
    if j == 0:
      if total_digit >= a and total_digit <= b:
        total += i
print(total)
Problem p03480 (python)

Fixed submission:
import sys

s = sys.stdin.readline().rstrip()
n = len(s)

def main():
    m = n // 2
    if n & 1:
        l = s[m::-1]
        r = s[m:]
    else:
        l = s[m-1::-1]
        r = s[m:]
    base = l[0]

    cnt = m
    i = 0
    if n & 1:
        m += 1
    while i < m:
        if l[i] == r[i] == base:
            i += 1
            cnt += 1
        else:
            break
    return cnt
    
if __name__ == '__main__':
    ans = main()
    print(ans)

Buggy submission (verdict: Runtime Error):
import sys

s = sys.stdin.readline().rstrip()
n = len(s)

def main():
    m = n // 2
    if n & 1:
        l = s[m::-1]
        r = s[m:]
    else:
        l = s[m-1::-1]
        r = s[m:]
    base = l[0]
    
    cnt = m
    i = 0
    while i <= m:
        if l[i] == r[i] == base:
            i += 1
            cnt += 1
        else:
            break
    return cnt
    
if __name__ == '__main__':
    ans = main()
    print(ans)
Problem p03488 (python)

Fixed submission:
import sys

s = sys.stdin.readline().rstrip()
x, y = map(int, sys.stdin.readline().split())

def reachable(deltas, goal):
    if not deltas:
        if goal == 0:
            return True
        else:
            return False
    
    s = sum(deltas)
    if goal < -s or s < goal:
        return False

    res = [False] * (s * 2 + 1) 
    res[s] = True
    
    for d in deltas:
        prev = res.copy()
        res = [False] * (s * 2 + 1)
        for i in range(s*2+1):
            if prev[i]:
                res[i+d] = res[i-d] = True

    return res[s + goal]


def main():
    gx = x; gy = y
    dx = []
    dy = []
    direction = 0

    origin_x = 0
    for i in s:
        if i == 'T':
            break
        origin_x += 1
    gx -= origin_x

    tmp = 0
    for i in s[origin_x:] + 'T':
        if i == 'T':
            if direction == 0:
                if tmp != 0:
                    dx.append(tmp)
                direction = 1
            else:
                if tmp != 0:
                    dy.append(tmp)
                direction = 0
            tmp = 0
        else:
            tmp += 1

    return 'Yes' if reachable(dx, gx) & reachable(dy, gy) else 'No'
    
if __name__ == '__main__':
    ans = main()
    print(ans)

Buggy submission (verdict: Runtime Error):
import sys

s = sys.stdin.readline().rstrip()
x, y = map(int, sys.stdin.readline().split())

def reachable(deltas, goal):
    if not deltas:
        if goal == 0:
            return True
        else:
            return False
    
    s = sum(deltas)
    res = [False] * (s * 2 + 1) 
    res[s] = True
    
    for d in deltas:
        prev = res.copy()
        for i in range(s*2+1):
            if prev[i]:
                res[i+d] = res[i-d] = True

    return res[s + goal]


def main():
    gx = x; gy = y
    dx = []
    dy = []
    direction = 0

    origin_x = 0
    for i in s:
        if i == 'T':
            break
        origin_x += 1
    gx -= origin_x

    tmp = 0
    for i in s[origin_x:] + 'T':
        if i == 'T':
            if direction == 0:
                if tmp != 0:
                    dx.append(tmp)
                direction = 1
            else:
                if tmp != 0:
                    dy.append(tmp)
                direction = 0
            tmp = 0
        else:
            tmp += 1

    return 'Yes' if reachable(dx, gx) & reachable(dy, gy) else 'No'
    
if __name__ == '__main__':
    ans = main()
    print(ans)
Problem p03493 (python)

Fixed submission:
ls = input()
count = 0
for l in ls:
  if l == '1':
    count += 1
print(count)

Buggy submission (verdict: Runtime Error):
ls = list(map(int, input().split()))
count = 0
for i in ls:
  if ls[i] == 1:
    count += 1
print(count)
Problem p03496 (python)

Fixed submission:
import sys

n, *a = map(int, sys.stdin.read().split())

def main():
    ma = 0
    idx = 0
    for i in range(n):
        cur = abs(a[i])
        if cur > ma:
            ma = cur
            idx = i

    if a[idx] == 0:
        print(0)
        sys.exit()

    procedures = []
    for i in range(n):
        a[i] += a[idx]
        procedures.append('{0} {1}'.format(idx+1, i+1))

    if a[idx] > 0:
        for i in range(n-1):
            if a[i] > a[i+1]:
                a[i+1] += a[i]
                procedures.append('{0} {1}'.format(i+1, i+2))
    else:
        for i in range(n-1, 0, -1):
            if a[i] < a[i-1]:
                a[i-1] += a[i]
                procedures.append('{0} {1}'.format(i+1, i))

    procedures = [len(procedures)] + procedures
    return procedures
    
if __name__ == '__main__':
    ans = main()
    print(*ans, sep='\n')

Buggy submission (verdict: Runtime Error):
import sys
import numpy as np

I = np.array(sys.stdin.read().split(), dtype=np.int64)
n = I[0]
a = I[1:]

def main():
    i = np.argmax(np.absolute(a))

    if a[i] == 0:
        print(0)
        sys.exit()

    print(n * 2)
    res1 = np.concatenate((np.full(3, i+1)[:, None], np.arange(1, n+1)[:, None]), axis=1)
    if a[i] > 0:
        res2 = np.concatenate((np.arange(1, n)[:, None], np.arange(2, n+1)[:, None]), axis=1)
    else:
        res2 = np.concatenate((np.arange(n, 1)[:, None], np.arange(n-1, 0)[:, None]), axis=1)
    
    return np.concatenate((res1, res2))
    
if __name__ == '__main__':
    ans = main()
    for op in ans:
        print(*op, sep=' ')
Problem p03545 (python)

Fixed submission:
import sys
# import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics

def main():
    a, b, c, d = (int(x) for x in list(sys.stdin.readline().rstrip()))
    s = 7 - a
    if sum([b, c, d]) == s: res = '+++'
    elif sum([-b, c, d]) == s: res = '-++'
    elif sum([b, -c, d]) == s: res = '+-+'
    elif sum([b, c, -d]) == s: res = '++-'
    elif sum([-b, -c, d]) == s: res = '--+'
    elif sum([-b, c, -d]) == s: res = '-+-' 
    elif sum([b, -c, -d]) == s: res = '+--'
    if res[0] == '-': b = -b
    if res[1] == '-': c = -c
    if res[2] == '-': d = -d
    ans = [str(a)]
    for x in [b, c, d]:
        if x >= 0 : x = '+' + str(x)
        else: x = str(x)
        ans.append(x)
    print(''.join(ans) + '=7')


if __name__ == "__main__":
    # execute only if run as a script
    main()

Buggy submission (verdict: Runtime Error):
import sys
# import collections
# import math
# import string
# import bisect
# import re
# import itertools
# import statistics

def main():
    a, b, c, d = (int(x) for x in list(sys.stdin.readline().rstrip()))
    s = 7 - a
    if sum([b, c, d]) == s: res = '+++'
    elif sum([-b, c, d]) == s: res = '-++'
    elif sum([b, -c, d]) == s: res = '+-+'
    elif sum([b, c, -d]) == s: res = '++-'
    elif sum([-b, -c, d]) == s: res = '--+'
    elif sum([-b, c, -d]) == s: res = '-+-' 
    if res[0] == '-': b = -b
    if res[1] == '-': c = -c
    if res[2] == '-': d = -d
    ans = [str(a)]
    for x in [b, c, d]:
        if x >= 0 : x = '+' + str(x)
        else: x = str(x)
        ans.append(x)
    print(''.join(ans) + '=7')


if __name__ == "__main__":
    # execute only if run as a script
    main()
Problem p03673 (python)

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


n = int(input().rstrip())
a = [a for a in input().split()]

b = [None] * n
for i in range(n):
    if i % 2 == 0: b[n // 2 + i // 2] = a[i]
    else: b[n // 2 - (-(-i // 2))] = a[i]
if (n - 1) % 2 == 0: b = list(reversed(b))

for elem in b: print(elem, end=' ')

Buggy submission (verdict: Runtime Error):
import sys
from collections import deque

n, *a = map(int, sys.stdin.read().split())

def main():
    b = deque()
    for i in range(n):
        if (i & 1): b.appendleft(a[i])
        else: b.append(a[i])
    if (n & 1): b = b[::-1]
    print(*b, sep=' ')

if __name__ ==  '__main__':
    main()
Problem p03696 (python)

Fixed submission:
import sys


def main():
    n, s = sys.stdin.read().split()
    n = int(n)

    left, right = 0, 0
    for char in s:
        if char == '(':
            # if left:
            #     left -= 1
            # else:
                right += 1
        elif char == ')':
            if right:
                right -= 1
            else:
                left += 1
    
    ans = '(' * left + s + ')' * right
    print(ans)

            

if __name__ == "__main__":
    main()

Buggy submission (verdict: Runtime Error):
import sys


def main():
    n, s = sys.stdin.read().split()
    n = int(n)

    for i in range(n):
        if s[i] == ')':
            continue
        else:
            i_l = i
            break
    for i in range(n, 0, -1):
        if s[i-1] == '(':
            continue
        else:
            i_r = i
            break
    res_l = '(' * len(s[:i_l]) + s[:i_l]
    res_r = s[i_r:] + ')' * len(s[i_r:])

    c = s[i_l:i_r]
    count = c.count('(') - c.count(')')
    if count == 0:
        ans = res_l + c + res_r
    elif count < 0:
        ans = '(' * abs(count) + res_l + c + res_r
    else:
        ans = res_l + c + res_r + ')' * count
    print(ans)
    # s = '.' + s
    
    # # 左右から一度ずつチェック
    # # 左から
    # count = 0
    # flag = False
    # for i in range(1, len(s)):
    #     if s[i] == ')':
    #         if not flag:
    #             count += 1
    #         else:
    #             flag = False
    #     elif s[i] == '(':
    #         if s[i-1] == '.':
    #             count -= 1
    #         elif s[i-1] == ')':
    #             flag = True
    #         elif s[i-1] == '(':
    #             if not flag:
    #                 count -= 1
    #             else:
    #                 break
    
    # s = s.replace('.', '') + '.'
    # if count >= 1:
    #     s = '(' * count + s


    # count = 0
    # flag = False
    # for i in range(len(s)-2, -1, -1):
    #     if s[i] == '(':
    #         if not flag:
    #             count += 1
    #         else:
    #             flag = False
    #     elif s[i] == ')':
    #         if s[i+1] == '.':
    #             count -= 1
    #         elif s[i+1] == '(':
    #             flag = True
    #         elif s[i+1] == ')':
    #             if not flag:
    #                 count -= 1
    #             else:
    #                 break
    #     print(count)
    
    # s = s.replace('.', '')
    # if count >= 1:
    #     s = s + ')' * count

    # print(s)

            

if __name__ == "__main__":
    main()
Problem p03699 (python)

Fixed submission:
import sys
input = sys.stdin.readline
from itertools import combinations

N = int(input().rstrip())
score = [int(input().rstrip()) for _ in range(N)]
score.sort(reverse=1)

s_multiple_of_10 = [s for s in score if s % 10 == 0]
if len(s_multiple_of_10) == N: print(0)
s_not_multiple_of_10 = [s for s in score if s % 10 != 0]

# combinationsでも、先に１０の倍数を除外してから処理したらどうだろう
for i in range(len(s_not_multiple_of_10), 0, -1):
    for c in combinations(s_not_multiple_of_10, i):
        if sum(c) % 10 == 0:
            continue
        else:
            print(sum(c) + sum(s_multiple_of_10))
            exit()

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

N = int(input().rstrip())
s = [int(input().rstrip()) for _ in range(N)]
s.sort(reverse=1)

for s in s:
    if s % 10 != 0:
        break
else:
    print(0)

for i in range(N, 0, -1):
    for c in combinations(s, i):
        if sum(c) % 10 == 0:
            continue
        else:
            print(sum(c))
            exit()
Problem p03713 (python)

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

h, w = [int(x) for x in input().split()]

if h % 3 == 0 or 2 % 3 == 0:
    print(0)
    exit()

if h % 3 == 1:
    d = h // 3 
else:
    d = h // 3 + 1
block = [w * d, (h-d) * (w // 2), (h-d) * (w - w // 2)]
res1 = max(block) - min(block)
block = [w * d, w * d, w * (h - d * 2)]
res2 = max(block) - min(block)

if w % 3 == 1:
    d = w // 3 
else:
    d = w // 3 + 1
block = [h * d, (w-d) * (h // 2), (w-d) * (h - h // 2)]
res3 = max(block) - min(block)
block = [h * d, h * d, h * (w - d * 2)]
res4 = max(block) - min(block)

print(min(res1, res2, res3, res4))

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

h, w = [int(x) for x in input().split()]

if h % 3 == 0 or 2 % 3 == 0:
    print(0)
    exit()

if h % 3 == 1:
    d = h // 3 
else:
    d = h // 3 + 1
block = [w * d, (h-d) * (w // 2), (h-d) * (w - w // 2)]
for b in block:
    if b == int(b**0.5) ** 2:
        break
else:
    res1 = max(block) - min(block)

if w % 3 == 1:
    d = w // 3 
else:
    d = w // 3 + 1
block = [h * d, (w-d) * (h // 2), (w-d) * (h - h // 2)]
for b in block:
    if b == int(b**0.5) ** 2:
        break
else:
    res2 = max(block) - min(block)

print(min(res1, res2))
Problem p03719 (python)

Fixed submission:
a, b, c = [int(x) for x in input().split()]

if c >= a and c <= b:
    print("Yes")
else:
    print("No")

Buggy submission (verdict: Runtime Error):
N, K = [int(x) for x in input().split()]
arr = [0] * (10**5+1)
for _ in range(N):
    a, b = [int(x) for x in input().split()]
    arr[a] += b

remain = K
for i in range(1, 10**5+1):
    if arr[i] != 0:
        remain -= arr[i]
    if remain <= 0:
        print(i)
        exit()
Problem p03721 (python)

Fixed submission:
N, K = [int(x) for x in input().split()]
arr = [0] * (10**5+1)
for _ in range(N):
    a, b = [int(x) for x in input().split()]
    arr[a] += b

th = 0
for i in range(1, 10**5+1):
    if arr[i] != 0:
        th += arr[i]
    if th >= K:
        print(i)
        exit()

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

N, K = [int(x) for x in input().split()]
arr = [0] * (10**5+1)
for _ in range(N):
    a, b = [int(x) for x in input().split()]
    arr[a] += b

remain = K
for i in range(1, 10**5+1):
    if arr[i] != 0:
        remain -= arr[i]
    if remain <= 0:
        print(i)
        exit()
Problem p03732 (python)

Fixed submission:
import sys

n, W = map(int, sys.stdin.readline().split())
wv = map(int, sys.stdin.read().split())

wv = sorted(zip(*[wv] * 2))
min_w = wv[0][0]
W2 = 4 * n

def main():
    dp = [[[0] * (W2 + 1) for _ in range(n+1)] for _ in range(n+1)]
    
    for i in range(n):
        w, v = wv[i]
        w -= min_w - 1
        for j in range(1, i+2):
            for k in range(W2 + 1):
                if k + (min_w - 1) * j > W:
                    break
                dp[i+1][j][k] = dp[i][j][k]
                if k >= w:
                    dp[i+1][j][k] = max(dp[i][j][k], dp[i][j-1][k-w] + v)

    res = 0
    for j in dp[n]:
        res = max(res, max(j))

    return res

if __name__ == '__main__':
    ans = main()
    print(ans)

Buggy submission (verdict: Runtime Error):
n, W = [int(x) for x in input().split()]
weight = []
value = []
for i in range(n):
    wi, vi = [int(x) for x in input().split()]
    weight.append(wi)
    value.append(vi)

dp = [[0] * (W+1)] * (n+1)

for i in range(n):
    for w in range(W+1):
        if w >= weight[i]:
            dp[i+1][w] = max(dp[i][w - weight[i]] + value[i], dp[i][w])
        else:
            dp[i+1][w] = dp[i][w]
   
ans = dp[n][W]
print(ans)
Problem p03760 (python)

Fixed submission:
o = input()
e = input()

lo = len(o)
le = len(e)
i = 0
res = []
while True:
    if i == len(o):
        break
    else:
        res.append(o[i])
    if i == len(e):
        break
    else:
        res.append(e[i])
        i += 1

print(''.join(res))

Buggy submission (verdict: Runtime Error):
o = input()
e = input()

i = 0
res = []
while True:
    if o[i]:
        res.append(o[i])
    else:
        break
    if e[i]:
        res.append(e[i])
        i += 1
    else:
        break

print(''.join(res))

Buggy submission (verdict: Runtime Error):
o, e = input().split()

i = 0
res = []
while True:
    if o[i]:
        res.append(o[i])
    else:
        break
    if e[i]:
        res.append(e[i])
        i += 1
    else:
        break

print(''.join(res))

Buggy submission (verdict: Runtime Error):
o, e = input().split()

i = 0
res = []
while True:
    res.append(o[i])
    if e[i]:
        res.append(e[i])
        i += 1
    else:
        break

print(''.join(res))
Problem p03814 (python)

Fixed submission:
s = input()

for i in range(len(s)):
    if s[i] == 'A':
        a_index = i
        break

for j in range(-1, -(len(s)-a_index), -1):
    if s[j] == 'Z':
        z_index = j
        break

length = (len(s) + z_index) - a_index + 1
print(length)

Buggy submission (verdict: Runtime Error):
s = input()

for i in range(len(s)):
    if s[i] == 'A':
        a_index = i

for j in range(-1, -(len(s)-a_index), -1):
    if s[j] == 'Z':
        z_index = j

length = (len(s) + z_index) - a_index + 1
print(length)
Problem p03846 (python)

Fixed submission:
mod = 10 ** 9 + 7
N = int(input())
A = [int(a) for a in input().split()]
A.sort()

if N % 2 != 0:
    if A[0] == 0:
        for i in range(2, N, 2):
            if not (A[i] == i and A[i-1] == i):
                print(0)
                exit()
        order_count = 2 ** ((N - 1) // 2) % mod
    else:
        print(0)
        exit()

else:
    for i in range(1, N, 2):
        if not (A[i] == i and A[i-1] == i):
            print(0)
            exit()
    order_count = 2 ** (N // 2) % mod 

print(order_count)

Buggy submission (verdict: Runtime Error):
mod = 10 ** 9 + 7
N = int(input())
A = [int(a) for a in input().split()]

# Nが偶数ならAiは全て奇数、Nが奇数なら Aiは全て偶数でなければならない,なぜなら、2x + Ai = N - 1を満たすxが自然数(非負整数)でなければならないから
# さらに、Nが奇数の時はfor i in range(0, N, 2) において 0が１個、それ以外のiが２個ずつ存在しなければならず(これはAiが全て偶数であることも満たしている)、
# Nが偶数の時はfor i in range(1, N, 2) において 全てのiが２個ずつ存在しなければならない(これはAiがすべて奇数であることも満たしている)
# これを踏まえた上でNが偶数の時は N/2人の位置が決まれば反対側の人の位置も決まり、Nが奇数の時は中央の人は固定として、それ以外 (N-1)/2人の位置が決まれば残りの人は反対側で位置が決まる。それぞれ２通りなので、
# よって
if N % 2 != 0:
    for i in range(0, N, 2):
        if A.count(i) == 2:
            continue
        elif A.count(0) == 1:
            continue
        print(0)
        exit()
    
    #order_count = 1
    #for i in range((N - 1) // 2):
        order_count = 2 ** ((N - 1) // 2) % mod

else:
    for i in range(1, N, 2):
        if A.count(i) != 2:
            print(0)
            exit()
    #order_count = 1
    #for i in range(N // 2):
        order_count = 2 ** (N // 2) % mod

print(order_count)
Problem p03861 (python)

Fixed submission:
a, b, x = map(int, input().split())

count = b//x - (a-1)//x if a > 0 else b//x + 1

print(count)

Buggy submission (verdict: Runtime Error):
a, b, x = map(int, input().split())
ls = list(range(a, b+1))
count = [i % x for i in ls].count(0)

print(count)