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