3192. Minimum Operations to Make Binary Array Elements Equal to One II

// Approach: Greedy; count flips needed tracking current parity.
// Time: O(n) Space: O(1)

public class Solution {
    public int MinOperations(int[] nums) {
        int n = nums.Length, ans = 0, times = 0;

        for(int i = 0; i < n; i++)
        {
            if((nums[i] == 1 && times % 2 == 1) || (nums[i] == 0 && times % 2 == 0))
                times++;
        }
        return times;
    }
}