Create Solution.py

src/hash相关/q387_字符串中的第一个唯一字符/Solution.py

@@ -0,0 +1,15 @@
+class Solution:
+    def firstUniqChar(self, s: str) -> int:
+        if len(s)==0:
+            return -1
+        res = {}
+        for each in s:
+            if each in res:
+                res[each]+=1
+            else:
+                res[each] = 1
+        for i,each in enumerate(s):
+            if res[each] ==1:
+                return i
+        return -1
+