#include <iostream>

int main()
{
    int p, q, A;
    std::cin >> p >> q >> A;
    const int MAX = 1000000000;
    int ans = 0;
    if(p < q){
        ans = MAX - 100 + 1;
        for(int i = 1; i < 100; ++i){
            if(p * i / 100 - q * i / 100 < A) ++ans;
        }
    }else if(p == q){
        ans = (A == 0) ? 0 : MAX;
    }else{
        int ans = 0;
        for(int i = 1; i < 100 * A; ++i){
            if(p * i / 100 - q * i / 100 < A) ++ans;
        }
    }
    std::cout << ans << "\n";
}