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

int tax(int x, int p){
    return p * (100 + x) / 100;
}

int main(){
    int x, y, s;
    while(cin >> x >> y >> s, x != 0){
        int ans = 0;
        for(int a=1;a<s;++a){
            for(int b=1;b<s;++b){
                if(tax(x, a) + tax(x, b) == s){
                    ans = max(ans, tax(y, a) + tax(y, b));
                }
            }
        }
        cout << ans << endl;
    }

    return 0;
}
