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