#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  while (~scanf("%d%d%d", &n, &x, &y)) {
    int t = n * y;
    if (t % 100 == 0)
      printf("%d\n", n * y / 100 - x);
    else
      printf("%d\n", n * y / 100 + 1 - x);
  }
  return 0;
}
