mirror of
https://github.com/halfrost/LeetCode-Go.git
synced 2025-07-04 16:12:47 +08:00
63 lines
1.3 KiB
Markdown
63 lines
1.3 KiB
Markdown
# [1295. Find Numbers with Even Number of Digits](https://leetcode.com/problems/find-numbers-with-even-number-of-digits/)
|
||
|
||
|
||
|
||
## 题目
|
||
|
||
Given an array `nums` of integers, return how many of them contain an **even number** of digits.
|
||
|
||
**Example 1**:
|
||
|
||
```
|
||
Input: nums = [12,345,2,6,7896]
|
||
Output: 2
|
||
Explanation:
|
||
12 contains 2 digits (even number of digits).
|
||
345 contains 3 digits (odd number of digits).
|
||
2 contains 1 digit (odd number of digits).
|
||
6 contains 1 digit (odd number of digits).
|
||
7896 contains 4 digits (even number of digits).
|
||
Therefore only 12 and 7896 contain an even number of digits.
|
||
```
|
||
|
||
**Example 2**:
|
||
|
||
```
|
||
Input: nums = [555,901,482,1771]
|
||
Output: 1
|
||
Explanation:
|
||
Only 1771 contains an even number of digits.
|
||
```
|
||
|
||
**Constraints**:
|
||
|
||
- `1 <= nums.length <= 500`
|
||
- `1 <= nums[i] <= 10^5`
|
||
|
||
## 题目大意
|
||
|
||
给你一个整数数组 nums，请你返回其中位数为 偶数 的数字的个数。
|
||
|
||
提示：
|
||
|
||
- 1 <= nums.length <= 500
|
||
- 1 <= nums[i] <= 10^5
|
||
|
||
|
||
|
||
## 解题思路
|
||
|
||
- 给你一个整数数组，要求输出位数为偶数的数字的个数。
|
||
- 简单题，把每个数字转换为字符串判断长度是否是偶数即可。
|
||
|
||
## 代码
|
||
|
||
```go
|
||
func findNumbers(nums []int) int {
|
||
res := 0
|
||
for _, n := range nums {
|
||
res += 1 - len(strconv.Itoa(n))%2
|
||
}
|
||
return res
|
||
}
|
||
``` |