Add code for leetcode No.771.

Author: yanglr

leetcode-771/leetcode771.py

@@ -0,0 +1,11 @@
+class Solution:
+    def numJewelsInStones(self, J: str, S: str) -> int:
+        sum0 = 0
+
+        for j in J:
+            sum0 = sum0 + S.count(j)
+        return sum0
+
+# Below is tesing
+sol = Solution()
+print(sol.numJewelsInStones('aA', 'aAAbbbb'))