#include <bits/stdc++.h>
using namespace std;
int n, x, y;
int answer;
float temp;
int main() {
  cin >> n >> x >> y;
  temp = (float)n * (float)y / 100;
  temp -= (float)x;
  if (temp <= 0)
    answer = 0;
  else if (temp - (int)temp != 0)
    answer = (int)temp + 1;
  else
    answer = (int)temp;
  cout << answer;
  return 0;
}
