Compilare: user.cpp: In function ‘int getDist(int, int)’: user.cpp:20:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j; ^ user.cpp: In function ‘bool bellman()’: user.cpp:68:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < gc[crt].size() ; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:105:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < g[x].size() ; ++j) ^