Please find the logic to perform the below request withot using the while loops

Question

Please find the logic to perform the below request withot using the while loops.

Input			OutPut
Row	Person		row	person	Count
1	101		1	101	1
1	102		1	102	1
1	103		1	103	1
2	101		2	101	2
2	102		2	102	2
2	104		2	103	1
3	101		2	104	1
3	103		3	101	3
3	105		3	102	2
			3	103	3
			3	104	1
			3	105	1