Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:49:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:81:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<me.size();i++){ ~^~~~~~~~~~ main.cpp:96:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<allm.size();i++){ ~^~~~~~~~~~~~