Buggy python submission (verdict: Runtime Error):
def calc_gcd(a, b):
    from math import gcd
    return gcd(a, b)


if __name__ == '__main__':
    # ??????????????¬?????¨
    # start_time = datetime.now()
    # print('>>> {0}'.format(start_time))

    # ???????????\???
    data = [int(x) for x in input().split(' ')]

    # ?¨?????????????
    result = calc_gcd(data[0], data[1])

    # ???????????¨???
    print('{0}'.format(result))

Fixed submission:
def calc_gcd(x, y):
    """
    math.gcd()????????¨??§????????????python3.5??\??????AOJ???python?????????????????????3.4????????§?????¨??§?????????
    """
    if y == 0:
        return x
    else:
        return calc_gcd(y, x % y)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Buggy python submission (verdict: Runtime Error):
def calc_gcd(a, b):
    import math
    return math.gcd(a, b)


if __name__ == '__main__':
    # ??????????????¬?????¨
    # start_time = datetime.now()
    # print('>>> {0}'.format(start_time))

    # ???????????\???
    data = [int(x) for x in input().split(' ')]

    # ?¨?????????????
    result = calc_gcd(data[0], data[1])

    # ???????????¨???
    print('{0}'.format(result))

Fixed submission:
def calc_gcd(x, y):
    """
    math.gcd()????????¨??§????????????python3.5??\??????AOJ???python?????????????????????3.4????????§?????¨??§?????????
    """
    if y == 0:
        return x
    else:
        return calc_gcd(y, x % y)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Buggy python submission (verdict: Runtime Error):
import math


def calc_gcd(a, b):
    return math.gcd(a, b)


if __name__ == '__main__':
    # ??????????????¬?????¨
    # start_time = datetime.now()
    # print('>>> {0}'.format(start_time))

    # ???????????\???
    data = [int(x) for x in input().split(' ')]

    # ?¨?????????????
    result = calc_gcd(data[0], data[1])

    # ???????????¨???
    print('{0}'.format(result))

Fixed submission:
def calc_gcd(x, y):
    """
    math.gcd()????????¨??§????????????python3.5??\??????AOJ???python?????????????????????3.4????????§?????¨??§?????????
    """
    if y == 0:
        return x
    else:
        return calc_gcd(y, x % y)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Buggy python submission (verdict: Runtime Error):
def calc_gcd(a, b):
    from math import gcd
    return gcd(a, b)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Fixed submission:
def calc_gcd(x, y):
    """
    math.gcd()????????¨??§????????????python3.5??\??????AOJ???python?????????????????????3.4????????§?????¨??§?????????
    """
    if y == 0:
        return x
    else:
        return calc_gcd(y, x % y)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Buggy python submission (verdict: Runtime Error):
def calc_gcd(a, b):
    from math import gcd
    return gcd(a, b)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))

Fixed submission:
def calc_gcd(x, y):
    """
    math.gcd()????????¨??§????????????python3.5??\??????AOJ???python?????????????????????3.4????????§?????¨??§?????????
    """
    if y == 0:
        return x
    else:
        return calc_gcd(y, x % y)


if __name__ == '__main__':
    data = [int(x) for x in input().split(' ')]
    result = calc_gcd(data[0], data[1])
    print('{0}'.format(result))