vector<int> v = {9, 2, 5, 1};
     auto isEven = [](const int& a){ return a % 2 == 0; };
     cout << (any_of(v.begin(), v.end(), isEven) ? "Yes\n" : "No\n"); //outputs: Yes

     v = {9, 3, 5, 1};
     cout << (any_of(v.begin(), v.end(), isEven) ? "Yes\n" : "No\n"); // outputs: No