Compilare: user.cpp: In function ‘void Read()’: user.cpp:15:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,value; ^ user.cpp:15:13: warning: unused variable ‘value’ [-Wunused-variable] int i,j,value; ^ user.cpp: In function ‘void PairUp(int)’: user.cpp:73:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void Support()’: user.cpp:87:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^