Compilare: main.cpp: In function 'void Dfs(int)': main.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Dfs2(int, int)': main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool Do()': main.cpp:62:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Ad[i].size(); ++j ) ~~^~~~~~~~~~~~~~