#include <iostream>

void solve() {
    int n, k;
    std::cin >> n >> k;

    if (n + 1 <= k) {
        std::cout << "INF\n";
        return;
    }

    int ans = 0;
    for (int x = 0; x <= n * 2; ++x) {
        for (int d = 0; d <= k; ++d) {
            if ((x & (x + d)) == n) ++ans;
        }
    }

    std::cout << ans << "\n";
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}