mirror of
https://github.com/halfrost/LeetCode-Go.git
synced 2025-07-05 00:25:22 +08:00
37 lines
628 B
Markdown
37 lines
628 B
Markdown
# [217. Contains Duplicate](https://leetcode.com/problems/contains-duplicate/)
|
||
|
||
## 题目
|
||
|
||
Given an array of integers, find if the array contains any duplicates.
|
||
|
||
Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct.
|
||
|
||
|
||
Example 1:
|
||
|
||
```c
|
||
Input: [1,2,3,1]
|
||
Output: true
|
||
```
|
||
Example 2:
|
||
|
||
```c
|
||
Input: [1,2,3,4]
|
||
Output: false
|
||
```
|
||
|
||
Example 3:
|
||
|
||
```c
|
||
Input: [1,1,1,3,3,4,3,2,4,2]
|
||
Output: true
|
||
```
|
||
|
||
## 题目大意
|
||
|
||
这是一道简单题，如果数组里面有重复数字就输出 true，否则输出 flase。
|
||
|
||
## 解题思路
|
||
|
||
用 map 判断即可。
|