#include <bits/stdc++.h>
using namespace std;
int x, y, e, f, i, k, j, l, n, m, t;
int main() {
  cin >> n >> x >> y;
  if (n * y % 100 > 0)
    f = n * y / 100 + 1;
  else
    f = n * y / 100;
  f = f - x;
  cout << f;
}
