[leetcode]Implement strStr() @ Python - 南郭子綦 - 博客园

[leetcode]Implement strStr() @ Python - 南郭子綦 - 博客园: " if len(haystack) < len(needle): return None
i = 0
while i < len(haystack)-len(needle)+1:
j = 0; k = i
while j < len(needle):
if haystack[k] == needle[j]:
j+=1; k+=1
else:
break
if j == len(needle):
break
else:
i+=1
if i == len(haystack)-len(needle)+1:
return None
else:
return haystack[i:]"



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