#include <bits/stdc++.h>
using namespace std;
int main() {
  long double n, y;
  long long x;
  cin >> n >> x >> y;
  y /= 100;
  long double z = y * n;
  long long ans = 0;
  if (z - (long long)z != 0) {
    ans = (long long)z + 1;
  } else {
    ans = z;
  }
  cout << ans - x;
}
