27. Remove Element

Hint

class Solution {
public:
    int removeElement(vector<int>& nums, int val)
    {
        // Initialize a counter to keep track of the new length of the array
        // Iterate through each element of the array
        for ()
        {
            // If the current element is not equal to the value to be removed
            if ()
            {
                // Assign the current element to the position indicated by cnt and increment cnt
            }
        }
        // Return the new length of the array, which is the count of elements not equal to val
    }
};

class Solution {
public:
    int removeElement(vector<int>& nums, int val)
    {
        int cnt = 0;
        for (int i = 0; i < nums.size(); ++i)
        {
            if (nums[i] != val)
            {
                nums[cnt++] = nums[i];
            }
        }
        return cnt;
    }
};

• T: $O(N)$
• S: $O(1)$