def main():
    a, b, c, d = map(int, input().split())
    x = y = 0
    if a > 0 and c > 0:
        x = c // a
    elif a > 0 and c == 0:
        x = 0
    elif a == 0:
        x = 1000
    if b > 0 and d > 0:
        y = d // b
    elif b > 0 and d == 0:
        y = 0
    elif b == 0:
        y = 1000
    print(min(x, y))


if __name__ == '__main__':
    main()