Compilare: user.cpp: In function ‘int main()’: user.cpp:12:24: warning: unused variable ‘xmx’ [-Wunused-variable] long long n,i,j,mx,xmx,nr,nrmx,rmx,x,y,nmx,s,smx; ^ user.cpp:12:31: warning: variable ‘nrmx’ set but not used [-Wunused-but-set-variable] long long n,i,j,mx,xmx,nr,nrmx,rmx,x,y,nmx,s,smx; ^ user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&n); ^ user.cpp:17:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&x); ^