Compilare: main.cpp: In function 'void Read()': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();j++){ ~^~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[nod].size();i++){ ~^~~~~~~~~~~~~~~~~~