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