#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y, p;
  cin >> n >> x >> y;
  if ((n * y) % 100 == 0) {
    p = (n * y) / 100;
    cout << p - x;
  } else {
    p = ((n * y) / 100) + 1;
    if (p > x) {
      p -= x;
      cout << p;
    } else
      cout << 0;
  }
  return 0;
}
