Compilare: user.cpp: In function ‘int main()’: user.cpp:34:46: warning: unused variable ‘mat’ [-Wunused-variable] unsigned long long n,p,i,a[20],k=0,b[10],mat[10][10],j,z,s,ok,inloc,q,oprire,ver; ^ user.cpp:34:82: warning: variable ‘ver’ set but not used [-Wunused-but-set-variable] unsigned long long n,p,i,a[20],k=0,b[10],mat[10][10],j,z,s,ok,inloc,q,oprire,ver; ^