1#include <stdio.h>
2#include <string.h>
3
4int findNumbers(int* nums, int numsSize) {
5    int count = 0;
6    for (int i = 0; i < numsSize; i++) {
7        char str[10];
8        sprintf(str, "%d", nums[i]);
9        if (strlen(str) % 2 == 0) {
10            count++;
11        }
12    }
13    return count;
14}
15
16int main() {
17    int nums[] = {12, 345, 2, 6, 7896};
18    int size = sizeof(nums) / sizeof(nums[0]);
19    printf("%d\n", findNumbers(nums, size));
20    return 0;
21}

1using System;

class Program {
    static int FindNumbers(int[] nums) {
        int count = 0;
        foreach (var num in nums) {
            if ((int)Math.Floor(Math.Log10(num) + 1) % 2 == 0) {
                count++;
            }
        }
        return count;
    }

    static void Main() {
        int[] nums = {12, 345, 2, 6, 7896};
        Console.WriteLine(FindNumbers(nums));
    }
}