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