Compilare: main.cpp: In function 'void afisare()': main.cpp:181:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ma[i].size();j++) ~^~~~~~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:221:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ma[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void DFS2(int)': main.cpp:233:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ma[nod].size();i++) ~^~~~~~~~~~~~~~~