#include <bits/stdc++.h>
using namespace std;
typedef long double real;
int n, x, y;
int main() {
  scanf("%d %d %d", &n, &x, &y);
  int people = n * (y / 100);
  y = y % 100;
  for (int k = 0; k < n; ++k) {
    if (k * 100 >= n * y) {
      people += k;
      break;
    }
  }
  printf("%d\n", max(0, people - x));
}
