Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<L[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<L[ic].size(); i++) ~^~~~~~~~~~~~~ main.cpp:47:17: warning: unused variable 'dc' [-Wunused-variable] int dc = s.begin()->first; ^~