#include <bits/stdc++.h>
using namespace std;

#define int long long
int p, q, a;

signed main(){
    cin >> p >> q >> a;

    int ans = 0;

    int i;
    for(i = 1;i <= 10000000;i++){
        if(i + i * p /100 <  i + i * q / 100 + a){
            ans++;
        }
    }

    if(i + i * p / 100 < i + i * q / 100 + a)
        ans += 990000000;

    cout << ans << endl;

    return 0;
}