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| class Solution:
data = [None] * 32
data[1] = '1'
def countAndSay(self, n: int) -> str:
if self.data[n] is not None:
return self.data[n]
last_result = self.countAndSay(n - 1)
result = ''
while (size := len(last_result)) > 0:
count = 1
while count < size and last_result[count] == last_result[0]:
count += 1
result = f'{result}{count}{last_result[0]}'
last_result = last_result[count:]
self.data[n] = result
return result
|