```
class Solution(object):
def countAndSay(self, n):
"""
:type n: int
:rtype: str
"""
if n==0:return ""
st="1"
for k in range(1,n,1):
i=0
temp=""
while i<len(st):
j=i+1
while j<len(st):
if st[j]!=st[i]:break
else: j+=1
temp+=(str(j-i)+str(st[i]))
i=j
st=temp[:]
return st
```