idkwhy

Use rpsrunner.py to play unranked matches on your computer.

Source code:

x = 0

if input == "":
	rockCount = paperCount = scissorsCount = 0

elif input == "R":
	rockCount += 1
	x = rockCount

elif input == "P":
	paperCount += 1
	x = paperCount

elif input == "S":
	scissorsCount += 1
	x = scissorsCount

for i in range(0, 10):
	if x % 2 == 0:
		x /= 2

	else:
		x = (x * 3) + 1

res = x % 3

if res == 0:
	output = "R"

elif res == 1:
	output = "P"

else:
	output = "S"