Compilare: main.cpp: In function 'void DFS(int)': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < adj[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < conexe[start].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < conexe[i].size(); ++j) ~~^~~~~~~~~~~~~~~~~~ main.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < ans.size(); ++i) ~~^~~~~~~~~~~~