Compilare: main.cpp: In function 'void Read()': main.cpp:24:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^ main.cpp: In function 'void DFS(int, int)': main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Ad[nod].size(); ++i) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:73:11: warning: unused variable 'j' [-Wunused-variable] int i,j,ct=0; ^ main.cpp:73:13: warning: unused variable 'ct' [-Wunused-variable] int i,j,ct=0; ^~