import math


def main():
    n, x, y = map(int, input().split())
    percent_of_need = math.ceil(n / 100 * y)
    if x >= percent_of_need:
        ans = x - percent_of_need
    else:
        ans = percent_of_need - x
    print(ans)


if __name__ == '__main__':
    main()
