Compilare: user.cpp: In function ‘int main()’: user.cpp:18:6: warning: unused variable ‘i’ [-Wunused-variable] int i,n,x,y; ^ user.cpp:18:8: warning: unused variable ‘n’ [-Wunused-variable] int i,n,x,y; ^ user.cpp:18:10: warning: unused variable ‘x’ [-Wunused-variable] int i,n,x,y; ^ user.cpp:18:12: warning: unused variable ‘y’ [-Wunused-variable] int i,n,x,y; ^ user.cpp:20:12: warning: unused variable ‘s’ [-Wunused-variable] long long s,maxsum; ^