Compilare: main.cpp: In function 'void DFS(int)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | while (nr[k] < L[k].size()) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> Muchie(int, int)': main.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | while (nr1[tag] < a[tag].size()) | ~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:38:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while (nr1[tag] < a[tag].size()) | ~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:44:1: warning: control reaches end of non-void function [-Wreturn-type] 44 | } | ^