Compilare: main.cpp: In function 'int prim()': main.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < L[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:68:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < L[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:80:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < Rez.size(); i++) ~~^~~~~~~~~~~~ main.cpp:82:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^