Jewels and Stones
题目描述
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:
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Example 2:
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Note:
- S and J will consist of letters and have length at most 50.
- The characters in J are distinct.
题目大意
求 S
中有多少个 J
中的字母,区分大小写。
解题思路
辅助字典,暴力搜索
代码
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