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038_count_and_say.py
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038_count_and_say.py
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class Solution:
def countAndSay(self, n):
"""
:type n: int
:rtype: str
"""
if n == 1:
return '1'
str_list = []
str_n_1 = str(self.countAndSay(n - 1))
look = str_n_1[0]
say = 1
j = 1
while j < len(str_n_1) and str_n_1[j]:
if look == str_n_1[j]:
say += 1
else:
str_list.extend(str(say))
str_list.extend(str(look))
look = str_n_1[j]
say = 1
j += 1
str_list.extend(str(say))
str_list.extend(str(look))
return "".join(str_list)
if __name__ == "__main__":
sol = Solution()
print(sol.countAndSay(1))
print(sol.countAndSay(2))
print(sol.countAndSay(3))
print(sol.countAndSay(4))
print(sol.countAndSay(5))
print(sol.countAndSay(6))
print(sol.countAndSay(7))
print(sol.countAndSay(8))
print(sol.countAndSay(9))
print(sol.countAndSay(10))