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Solution199.cs
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Solution199.cs
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using LeetCode.DataStructures;
namespace LeetCode.Solutions;
public class Solution199
{
/// <summary>
/// 199. Binary Tree Right Side View - Medium
/// <a href="https://leetcode.com/problems/binary-tree-right-side-view">See the problem</a>
/// </summary>
public IList<int> RightSideView(TreeNode root)
{
var result = new List<int>();
if (root == null)
{
return result;
}
var queue = new Queue<TreeNode>();
queue.Enqueue(root);
while (queue.Count > 0)
{
var size = queue.Count;
for (var i = 0; i < size; i++)
{
var node = queue.Dequeue();
if (i == size - 1)
{
result.Add(node.val);
}
if (node.left != null)
{
queue.Enqueue(node.left);
}
if (node.right != null)
{
queue.Enqueue(node.right);
}
}
}
return result;
}
}