Compilare: user.cpp: In function ‘int pop()’: user.cpp:41:9: warning: unused variable ‘t’ [-Wunused-variable] int t=dist[0]; ^ user.cpp: In function ‘int main()’: user.cpp:84:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] fr(i,0,o[m].size())grey+=upd(o[m][i].v,dist[p[m]]+o[m][i].d); ^ user.cpp:3:33: note: in definition of macro ‘fr’ #define fr(i,a,b) for(int i=a;i<b;++i) ^