Compilare: main.cpp: In function 'void dfs2(int, int)': main.cpp:62:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[k].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'void afisare()': main.cpp:89:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<C[i].size();j++) ~^~~~~~~~~~~~ main.cpp:85:12: warning: unused variable 'nr' [-Wunused-variable] { int i ,j,nr=0 ; ^~