Compilare: main.cpp: In function 'void print_ans()': main.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i = 0; i < comp.size(); i++){ | ~~^~~~~~~~~~~~~ main.cpp:68:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j = 0; j < comp[i].size(); j++) | ~~^~~~~~~~~~~~~~~~