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