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