import math
def solve():
    words = input().split()
    people = int(words[0])
    wizards = int(words[1])
    percent = int(words[2])/100
    current = wizards/people
    per = 1/people
    if current>=percent:
        print(0)
        return
    count = 0
    while current<percent:
        count +=1
        current = current+per
    print(count)

# for _ in range(int(input())):
solve()