Var x,i,j,sum,n:int64;beginread(n);for i:=1 to n do begin for j:=1 to n do begin read(x); if i+jgt;n+1 then begin inc(sum,x); end; end; end;if (sum mod 2)=0 then begin sum:=sum div 2; if (sum mod 2)=0 then writeln(YES) else writeln(NO); end else writeln(NO);end.