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

w = sys.stdout.write
read = sys.stdin.readline
reads = sys.stdin.read

def r(f=None):
    if f:
        return map(f, read().split())
    else:
        return read().split()

def rs(t,f=None):
    result = []
    result_append = result.append
    for i in xrange(t):
        if f:
            result_append(map(f, read().split()))
        else:
            result_append(read().split())
    return result


####################################################
import math

[n, x, y] = r(int)

hm = math.ceil(float(n) / 100.0 * y) 
w(str(int(max(0, hm - x))))
