#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  long long a, aux;
  cin >> n >> x >> y;
  double q = double(n * y) / 100;
  if (q - (int)q > 0) {
    a = (long long)q + 1;
  } else {
    a = q;
  }
  aux = (long long)abs(x - a);
  cout << aux << endl;
  return 0;
}
