Buggy python submission (verdict: Time Limit Exceeded):
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    for i, x in enumerate(s[::-1]):
        y = l[-1] + int(x) * pow(10, i)
        z = y % n
        l.append(z)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    from collections import Counter
    from math import factorial as f
    s = input()
    l = len(s)
    n = 2019
    t = [int(s[-i:]) % n for i in range(1, l + 1)]
    c = Counter(t)
    ans = 0
    for k, v in c.items():
        if v > 1:
            c = f(v) // f(v - 2) // 2
            ans += c
        if k == 0:
            ans += v
    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    ans = 0
    n = len(s)
    m = 2019
    for i in range(n - 3):
        for j in range(i + 3, n):
            t = int(s[i:j + 1])
            if t % m == 0:
                ans += 1
    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    l = [0 for _ in range(len(s))]
    for i in range(1, len(s) + 1):
        x = int(s[-i:])
        l[-i] = x % 2019

    ans = 0
    for x in set(l):
        y = l.count(x)
        ans += y * (y - 1) // 2
        if x == 0:
            ans += y
    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    ans = 0
    for i in range(4, len(s) + 1, 1):
        for j in range(0, i - 3, 1):
            if j == 0:
                x = int(s[-i:]) % 2019
            else:
                x = int(s[-i:]) - int(s[-j:])
            if x % 2019 == 0:
                ans += 1

    print(ans)

if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    l = [0 for _ in range(len(s))]
    for i in range(1, len(s) + 1):
        x = int(s[-i:])
        l[-i] = x % 2019
    ans = 0
    for i in range(4, len(s) + 1, 1):
        for j in range(0, i - 3, 1):
            if j == 0:
                x = int(s[-i:]) % 2019
            else:
                x = int(s[-i:]) - int(s[-j:])
            if x % 2019 == 0:
                ans += 1

    print(ans)

if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    l = [0 for _ in range(len(s))]
    for i in range(1, len(s) + 1):
        x = int(s[-i:])
        l[-i] = x % 2019
    ans = 0
    for i in range(4, len(s) + 1, 1):
        for j in range(0, i - 3, 1):
            if j == 0:
                x = l[-i]
            else:
                x = l[-i] - l[-j]
            if x % 2019 == 0:
                ans += 1

    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    l = [0 for _ in range(len(s))]
    for i in range(1, len(s) + 1):
        x = int(s[-i:])
        l[-i] = x % 2019
    ans = 0
    for i in range(4, len(s) + 1, 1):
        for j in range(0, i - 3, 1):
            if j == 0:
                x = l[-i]
            else:
                x = l[-i] - l[-j]
            if x % 2019 == 0:
                ans += 1

    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
def main():
    s = input()
    m = int(s) // 2019 / 10 ** 5
    l = [0 for _ in range(len(s))]
    for i in range(1, len(s) + 1):
        x = int(s[-i:])
        l[-i] = x % 2019
    ans = 0
    for i in range(4, len(s) + 1, 1):
        for j in range(0, i - 3, 1):
            if j == 0:
                x = l[-i]
            else:
                x = l[-i] - l[-j]
            if x % 2019 == 0:
                ans += 1

    print(ans)


if __name__ == '__main__':
    main()


Fixed submission:
def main():
    from collections import Counter
    s = input()

    n = 2019
    l = [0]
    t = 1
    for i, x in enumerate(s[::-1]):
        t = t * 10 % n
        y = (l[-1] + int(x) * t) % n
        l.append(y)

    c = Counter(l)
    ans = sum([v * (v - 1) // 2 for v in c.values()])
    print(ans)


if __name__ == '__main__':
    main()