#include <bits/stdc++.h>
using namespace std;
int main() {
  int k, n, x, y, clone = 0;
  float t;
  while (scanf("%d%d%d", &n, &x, &y) != EOF) {
    t = (y / 100.0) * n;
    k = ceil(t);
    printf("%d\n", k - x);
  }
  return 0;
}
