#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y, ex;
  cin >> n >> x >> y;
  ex = (n * y) / 100;
  if (ex != ((n * y) / 100)) ex++;
  if (x - ex < 0)
    cout << ex - x;
  else
    cout << x - ex;
  return 0;
}
