#include <bits/stdc++.h>
using namespace std;
void solve() {
  int n, x, y, r;
  cin >> n >> x >> y;
  double req;
  req = ((double)y / 100) * (double)n;
  if (req > (int)req)
    r = (int)req + 1;
  else
    r = req;
  cout << r - x;
}
int main() {
  int t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
