Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:58:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] 37 | } | ^