#include <bits/stdc++.h>
int main() {
  long long int n, x, y;
  scanf("%I64d %I64d %I64d", &n, &x, &y);
  if ((n * y) % 100 == 0)
    n = (n * y) / 100;
  else
    n = ((n * y) / 100) + 1;
  n = n - x;
  printf("%I64d", n);
}
