unilecs

using System;
using System.Collections.Generic;
					
public class Program
{
	public class TreeNode
	{
		public int val;
		public TreeNode left;
		public TreeNode right;

unilecs

using System;
using System.Collections.Generic;
					
public class Program
{
	public static bool CheckWordSquare(List<string> words) 
	{
		int len = words.Count;

		for(int i = 0; i < len; i++)

unilecs

using System;
using System.Linq;
using System.Collections.Generic;
					
public class Program
{
	public static int[] ApplyDiscounts(int[] prices) 
	{
		int len = prices.Length;
		var stack = new Stack<int>();

unilecs

using System;
using System.Linq;
using System.Collections.Generic;
					
public class Program
{
	public class StockSpan
	{
		private readonly Stack<(int price, int num)> stack;
		public StockSpan() {

unilecs

using System;
					
public class Program
{
	public static int FindMissingItem(int[] nums, int k) {
		int len = nums.Length;
		if (len == 1)
		    return nums[0] + k;

		for (int i = 1; i < len; i++)

unilecs

using System;
					
public class Program
{
	public static int MinSubArrayLen(int target, int[] nums) 
	{
		int len = nums.Length;
		int left = 0;
		int sum = 0;
		int res = int.MaxValue;

unilecs

using System;
					
public class Program
{
	public static int GetSingleNumber(int[] nums) {
		int single = 0;
		int twice = 0;

		foreach (int num in nums)
		{

unilecs

using System;
					
public class Program
{
	public static int FindMarioWay(int[][] matrix)
	{
		int rows = matrix.Length;
		int cols = matrix[0].Length;
		int[,] d = new int[rows, cols];
		

unilecs

using System;
					
public class Program
{
	public static void DuplicateZeros(int[] arr) 
	{
		int len = arr.Length;
		for(int i = 0; i < len; i++)
		{
		    if (arr[i] == 0)

unilecs

using System;
using System.Collections.Generic;
					
public class Program
{
	public static IList<int> ArraysIntersection(int[] arr1, int[] arr2, int[] arr3) 
	{
		int p1 = 0, p2 = 0, p3 = 0;
		var result = new List<int>();