Compilare: main.cpp: In function 'bool operator<(nume1, nume1)': main.cpp:14:8: warning: statement has no effect [-Wunused-value] D[a.x]>D[b.x]; ~~~~~~^~~~~~~ main.cpp:15:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void djk(int)': main.cpp:46:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[act.x].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:39:13: warning: unused variable 'vec' [-Wunused-variable] nume1 act,vec; ^~~