#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  scanf("%d %d %d", &n, &x, &y);
  float temp = static_cast<float>(y) / 100.0;
  temp = static_cast<int>(ceil(temp * n));
  cout << temp - x << endl;
  return 0;
}
