Compilare: main.cpp: In function 'int main()': main.cpp:32:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int z = loc[act]; z < gr[act].size(); z++) { | ~~^~~~~~~~~~~~~~~~ main.cpp:37:13: warning: statement has no effect [-Wunused-value] 37 | loc[act]==z + 1; | ~~~~~~~~^~~~~~~ main.cpp:47:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 47 | if (ans.size() - 1 != m) { | ~~~~~~~~~~~~~~~^~~~ main.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 0; i < ans.size(); i++) { | ~~^~~~~~~~~~~~