#include<iostream>
#include<algorithm>

int main(){
    int a, b;
    std::cin >> a >> b;

    int min = 10000000;
    for(int i = 0; i <= 1000; i++){
        for(int j = 0; j <= 1000; j++){
            if(i == 0 && j == 0) continue;
            if(static_cast<int>(100.0 * i / (i + j) + 0.5) == a){
                if(static_cast<int>(100.0 * j / (i + j) + 0.5) == b){
                    min = std::min(min, i + j);
                }
            }
        }
    }
    std::cout << min << std::endl;
    return 0;
}