#include <iostream>

int main()
{
    int nums[10] = {1, 2, 4, 7, 4, 8, 10, 7, 1, 2}; // example
    int n = 10;

    // populate the array

    int lengths[1000];
    int len = 0;
    int index = -1;

    for (int i = 0; i < n; i++)
    {
        if (nums[i] % 2 == 0)
        {
            if (len == 0)
                index++;

            len++;

            if (i == n - 1)
                lengths[index] = len;
        }
        else if (len != 0)
        {
            lengths[index] = len;
            len = 0;
        }
    }

    for (int i = 0; i <= index; i++)
        std::cout << lengths[i] << " ";
}