#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  cin >> n >> x >> y;
  float k = (y / 100.0) * n;
  int b = ceil(k);
  int ans = b - x;
  if (ans > 0)
    cout << ans;
  else
    cout << 0;
  return 0;
}
