Compilare: main.cpp: In function 'void Useless()': main.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp:53:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Ad[vecin].size(); ++j ) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Dfs(int, int)': main.cpp:75:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp:74:9: warning: unused variable 'w' [-Wunused-variable] int w; ^