Compilare: user.cpp: In function ‘int main()’: user.cpp:9:21: warning: unused variable ‘j’ [-Wunused-variable] long long n,k,i,j,s1,s2,cnt=0,m,a,b; ^ user.cpp:9:29: warning: unused variable ‘cnt’ [-Wunused-variable] long long n,k,i,j,s1,s2,cnt=0,m,a,b; ^