def insert(pages, index):
	value = pages.pop(index)
	for i, elem in enumerate(pages):
		if value == elem:
			return i
		if value < elem:
			pages.insert(i, value)
			return i
	pages.append(value)
	return len(pages) - 1
 
q = int(input())
 
runners = {}
pages = []
for i in range(q):
	query = input().split(' ')
	runner = int(query[1])
	if query[0] == 'RUN':
		page = int(query[2])
		if runners.get(runner) is not None:
			pages[runners[runner]] = page
			runners[runner] = insert(pages, index=runners[runner])
		else:
			pages.append(page)
			runners[runner] = insert(pages, index=-1)
	if query[0] == 'CHEER':
		if runners.get(runner) is None:
			print("{:.6f}".format(0.0))
		else:
			print(runners, runners.values())
			if len(runners.values()) == 1:
				print("{:.6f}".format(1.0))
			else:
				print("{:.6f}".format((runners[runner] - 1)/len(runners.values())))
 

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12
CHEER 5
RUN 1 10
CHEER 1
RUN 2 5
RUN 3 7
CHEER 2
CHEER 3
RUN 3 10
CHEER 3
RUN 3 11
CHEER 3
CHEER 1