Solution: Jewels and Stones
Understand how to apply hash maps to solve the Jewels and Stones problem by counting characters effectively. This lesson teaches you to implement a fast membership check using a set, improving both time and space complexity in your coding solutions.
We'll cover the following...
We'll cover the following...
Statement
You are given two strings, jewels and stones. Each character in jewels represents a stone type that is a jewel, and each character in stones represents a stone you have. Count how many characters in stones belong to the set of characters in jewels.
Note: Matching is case-sensitive, so
'a'and'A'are different types of stones.
Constraints:
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