Compilare: user.cpp: In function ‘void read()’: user.cpp:21:15: warning: unused variable ‘cll’ [-Wunused-variable] long long cll; ^ user.cpp: In function ‘int bellman_ford(long long int)’: user.cpp:41:29: warning: overflow in implicit constant conversion [-Woverflow] memset(d, INF, sizeof(d)); ^ user.cpp:55:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[x].size(); i ++ ) ^ user.cpp:76:1: warning: control reaches end of non-void function [-Wreturn-type] } ^