3.20 PAT1069 乙级 python

微博转发抽奖

m,n,s = map(int,input().split())
lst = []
if m<s:
	print('Keep going...')
else:
	for i in range(1,m+1):
		name = input()
		if (i-s)%n == 0 and i>=s:
			if name not in lst:
				lst.append(name)
			else:
				s = s + 1
	for i in lst:
		print(i)