Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:13:19: 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:61:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<L[ins].size()&&dist[drg]>=L[ins][i].first;i++) { ~^~~~~~~~~~~~~~