Compilare: user.cpp: In function ‘int cauta(int, int)’: user.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<A[x].size(); i++) ^ user.cpp: In function ‘void euler(int, int)’: user.cpp:34:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0; it<A[nod].size(); it++) ^ user.cpp: In function ‘int cauta(int, int)’: user.cpp:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^