We have a long seat of width X centimeters. There are many people who wants to sit here. A person sitting on the seat will always occupy an interval of length Y centimeters.  We would like to seat as many people as possible, but they are all very shy, and there must be a gap of length at least Z centimeters between two people, and between the end of the seat and a person.  At most how many people can sit on the seat?
def main():
    x, y, z = map(int, input().split())

    p = 0
    length = 0
    while length <= x:
        length = y * p + z * (p - 1)
        p += 1

    print(p - 1)


if __name__ == '__main__':
    main()

def main():
    x, y, z = map(int, input().split())

    p = 0
    length = 0
    while length <= x:
        p += 1
        length = y * p + z * (p + 1)

    print(p - 1)


if __name__ == '__main__':
    main()
