/in/foo.cc: In function 'int max_jump(std::vector<int>&, int, int)':
/in/foo.cc:39:17: warning: unused variable 't' [-Wunused-variable]
             int t = V[V.size() - 1] - V[it];
                 ^
/in/foo.cc:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = it + 1; i < V.size() - n + 1; i++) {
                         ~~^~~~~~~~~~~~~~~~~~