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