#include <bits/stdc++.h>   using namespace std;   int main() {     long long a, b, c, x;     cin >> a >> b >> c;     if (a * c % 100 == 0)       x = (a * c) / 100;     else       x = (a * c) / 100 + 1;     if (x < b)       cout <<  0  << endl;     else       cout << x - b << endl;     return 0;   }   