Oh, oh, my math teacher gave Ding Ding a difficult problem. Please find the sum of two integers and add the two numbers.
There are no these two integers. Let these two integers be x and y, respectively, then (x+y)+(x-y)+1000 =1999 is simplified as 2x = 999 and x = 999/2.
X is not an integer. So we can't find two integers that meet the conditions.