vector<int> a{{2,4,6}};
vector<int> b{{1,2,3,4,5}};
vector<int> c{{-1,1-1,1,-1,1,-1,1}};

vector<int> res = map([](int x, int y, int z) {return a*b*c;}, a,b,c);
//res -> {-2,8,-18}