#include <iostream>
#include <stdio.h>
#include <Windows.h>
#include <deque>
#include <stdlib.h>
#include <math.h>

using namespace std;

int main()
{
	int n,x,y;

	cin >> n >> x >> y;

	float px = float(n)*float(y)/100.0f;

	cout << max(0,ceil(px) - x);

	return 0;
}