jewels-stones.py

# You're given strings J representing the types of stones that are jewels, and S representing the stones you have.  Each character in S is a type of stone you have.  You want to know how many of the stones you have are also jewels.

# The letters in J are guaranteed distinct, and all characters in J and S are letters. Letters are case sensitive, so "a" is considered a different type of stone from "A".

# Example 1:

# Input: J = "aA", S = "aAAbbbb"
# Output: 3
# Example 2:

# Input: J = "z", S = "ZZ"
# Output: 0
class Solution(object):
    def numJewelsInStones(self, J, S):
        """
        :type J: str
        :type S: str
        :rtype: int
        """
        return sum(map(S.count,J))

s=Solution()
print(s.numJewelsInStones('Z','ZZ'))