Compilare: user.cpp: In function ‘int main()’: user.cpp:26:23: warning: unused variable ‘pz’ [-Wunused-variable] int maxx=0,i,nr=0,pz,j,st,dr,mij,ans=0,n; ^ user.cpp:26:26: warning: unused variable ‘j’ [-Wunused-variable] int maxx=0,i,nr=0,pz,j,st,dr,mij,ans=0,n; ^ user.cpp: In function ‘bool cmp(eu, eu)’: user.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type] } ^