Compilare: main.cpp: In function 'bool bfs()': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[cur].adj.size();i++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(upto[nod]<graf[nod].adj.size()){ ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~