new file:   15561_find_pair/data
	new file:   15561_find_pair/data1
	new file:   15561_find_pair/gen.py
	new file:   15561_find_pair/pair.c
	new file:   15561_find_pair/pair1.c
	new file:   15561_find_pair/prb.txt
	deleted:    data