1437. Check If All 1's Are at Least Length K Places Away

class Solution {
public:
    bool kLengthApart(vector<int>& nums, int k)
    {
        int cnt = k;
        for (int num : nums)
        {
            if (num == 1)
            {
                if (cnt < k)
                {
                    return false;
                }
                cnt = 0;
            }
            else
            {
                ++cnt;
            }
        }
        return true;
    }
};

• T: $O(n)$
• S: $O(1)$