Compilare: user.cpp: In function ‘bool Conect(int)’: user.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v1[x].size();i++) ^ user.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v1[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:22:8: warning: unused variable ‘x’ [-Wunused-variable] {int i,x,j; ^