#include <iostream>

class Result {
public:
    uint64_t val;
    Result(uint64_t v)
    {
        val = v;
    }

    uint64_t ret()
    {
        return val;
    }
};

void bar(uint64_t a, uint64_t b)
{
    if (a == 0) {
        throw Result(b + 1);
    } else if (a > 0 && b == 0) {
        try {
            bar(a - 1, b);
        } catch (Result t) {
            throw t;
        }
    } else if (a > 0 && b > 0) {
        try {
            bar(a, b - 1);
        } catch (Result t){
            try {
                bar(a - 1, t.ret());
            } catch (Result t) {
                throw t;
            }
        }
    }
}

int main()
{
    uint64_t a, b;

    while (std::cin >> a >> b) {
        try {
            bar(a, b);
        } catch(Result t) {
            std::cout << t.ret() << std::endl;
        }
    }
}