first_unique_char_string.py (640B)
| # 387. First Unique Character in a String
"""
given a string 's', find the first non-repeating character in it and return
its index. if it does not exist, return -1
"""
class Solution(object):
def firstUniqChar(self, s):
"""
:type s: str
:rtype: int
"""
m = {}
for c in s:
m[c] = m.get(c, 0) + 1
for i in range(len(s)):
if m[s[i]] == 1:
return i
return -1
if __name__ == "__main__":
obj = Solution()
print(obj.firstUniqChar("leetcode"))
print(obj.firstUniqChar("loveleetcode"))
print(obj.firstUniqChar("aabb"))
|
