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g2301_2400.s2399_check_distances_between_same_letters.readme.md Maven / Gradle / Ivy

2399\. Check Distances Between Same Letters

Easy

You are given a **0-indexed** string `s` consisting of only lowercase English letters, where each letter in `s` appears **exactly** **twice**. You are also given a **0-indexed** integer array `distance` of length `26`.

Each letter in the alphabet is numbered from `0` to `25` (i.e. `'a' -> 0`, `'b' -> 1`, `'c' -> 2`, ... , `'z' -> 25`).

In a **well-spaced** string, the number of letters between the two occurrences of the ith letter is `distance[i]`. If the ith letter does not appear in `s`, then `distance[i]` can be **ignored**.

Return `true` _if_ `s` _is a **well-spaced** string, otherwise return_ `false`.

**Example 1:**

**Input:** s = "abaccb", distance = [1,3,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

**Output:** true

**Explanation:**

- 'a' appears at indices 0 and 2 so it satisfies distance[0] = 1.

- 'b' appears at indices 1 and 5 so it satisfies distance[1] = 3.

- 'c' appears at indices 3 and 4 so it satisfies distance[2] = 0.

Note that distance[3] = 5, but since 'd' does not appear in s, it can be ignored.

Return true because s is a well-spaced string. 

**Example 2:**

**Input:** s = "aa", distance = [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

**Output:** false

**Explanation:**

- 'a' appears at indices 0 and 1 so there are zero letters between them. Because distance[0] = 1, s is not a well-spaced string. 

**Constraints:**

*   `2 <= s.length <= 52`
*   `s` consists only of lowercase English letters.
*   Each letter appears in `s` exactly twice.
*   `distance.length == 26`
*   `0 <= distance[i] <= 50`