[LeetCode] 1295. Statistics with even digits (C++)

1 topic description

You are an integer array nums, please return the number of digits with even digits.

2 Example description

2.1 Example 1

Input: nums = [12,345,2,6,7896]
Output: 2
Explanation:
12 is a 2-digit number (the digits are even)
345 is a 3-digit number (the digits are odd)
2 is a 1-digit number (the digits are odd )
6 is a 1-digit number with an odd number of digits)
7896 is a 4-digit number (the number of digits is even)
so only 12 and 7896 are even-numbered numbers

2.2 Example 2

Input: nums = [555,901,482,1771]
Output: 1
Explanation:
Only 1771 is a number with even digits.

3 Problem solving tips

1 <= nums.length <= 500
1 <= nums[i] <= 10^5

4 Detailed source code (C++)

class Solution {
    
    
public:
    int findNumbers(vector<int>& nums) {
    
    
        int count = 0;
        for (int i = 0 ; i < nums.size() ; i ++)
        {
    
    
            if(to_string(nums[i]).size() % 2 == 0)
            {
    
    
                count ++ ;
            }
        }
        return count;
    }
};