#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  cin >> n >> x >> y;
  int m = y * n / 100;
  float a = y * n / 100.00;
  float b = a - m;
  if (b > 0) m = m + 1;
  int left = m - x;
  if (left < 0)
    cout << 0;
  else
    cout << left;
}
