# -*- coding: utf-8 -*-
import sys

if __name__ == '__main__':
    
    n,x,y = map(int,sys.stdin.readline().split())

    if 100*x >= n*y:
        print 0
    else:
        if y*n %100  == 0:
            print y*n /100 - x
        else:
            print  y*n /100 - x +1