#include <bits/stdc++.h>
using namespace std;
int main() {
  double n, a, b;
  cin >> n >> a >> b;
  b /= 100.00000;
  double x = a / n;
  if (x >= b)
    cout << 0;
  else {
    if ((double)(n * (double)(b - x)) == (int)(n * (double)(b - x)))
      cout << (int)(n * (b - x));
    else
      cout << (int)(n * (double)(b - x)) + 1;
  }
}
