Compilare: main.cpp: In function 'int hamilton()': main.cpp:21:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int k = 0; k < in[j].size(); k++) | ~~^~~~~~~~~~~~~~ main.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i = 0; i < in[0].size(); i++) | ~~^~~~~~~~~~~~~~