I'm trying to make a custom checker for this problem but in a different way. Actually in this problem setter wants to know minimum number snow heap . But I want to know the position also. In this situation the answer can be different. Such as, For the first input

2
2 1
1 2
**the answer ca be this**
1
1 1
**or can be this**
1
2 2

Again for another **testcase**
**input:**
3
2 2
4 4
8 7
**output1:**
2
2 4
2 7
**output2:**
2
2 4
8 2
**output3:**
2
4 2
4 7
and so on

Then how can i make the custom checker.
I prefer C++ to do this task.
Thanks in advance.