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Java-based LeetCode algorithm problem solutions, regularly updated

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520\. Detect Capital

Easy

We define the usage of capitals in a word to be right when one of the following cases holds:

*   All letters in this word are capitals, like `"USA"`.
*   All letters in this word are not capitals, like `"leetcode"`.
*   Only the first letter in this word is capital, like `"Google"`.

Given a string `word`, return `true` if the usage of capitals in it is right.

**Example 1:**

**Input:** word = "USA"

**Output:** true

**Example 2:**

**Input:** word = "FlaG"

**Output:** false

**Constraints:**

*   `1 <= word.length <= 100`
*   `word` consists of lowercase and uppercase English letters.