Compilare: main.cpp: In function 'bool cuplaj(int)': main.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<v[nod].size(); ++i){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<v[nod].size(); ++i){ ~^~~~~~~~~~~~~~