Compilare: user.cpp: In function ‘int main()’: user.cpp:10:17: warning: unused variable ‘nn’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:10:20: warning: unused variable ‘nr’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:10:25: warning: unused variable ‘mm’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:10:28: warning: unused variable ‘c’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:10:32: warning: unused variable ‘k’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:10:34: warning: unused variable ‘x’ [-Wunused-variable] long long i,nn,nr=0,mm,c=0,k,x,j; ^ user.cpp:16:16: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] in>>v[i]; ^