Compilare: user.cpp: In function ‘void dfs(long double, int)’: user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<nod[i].size();j++) ~^~~~~~~~~~~~~~ user.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:63:54: warning: overflow in implicit constant conversion [-Woverflow] memset(mn_time[i],LDBL_MAX,sizeof(mn_time[i])); ^