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