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Merge pull requestneetcode-gh#2107 from a93a/main

Create 0669-trim-a-binary-search-tree.kt

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	`1`	`+/**`
	`2`	`+ * Example:`
	`3`	`+ * var ti = TreeNode(5)`
	`4`	+ * var v = ti.`val`
	`5`	`+ * Definition for a binary tree node.`
	`6`	+ * class TreeNode(var `val`: Int) {
	`7`	`+ * var left: TreeNode? = null`
	`8`	`+ * var right: TreeNode? = null`
	`9`	`+ * }`
	`10`	`+*/`
	`11`	`+classSolution {`
	`12`	`+funtrimBST(root:TreeNode?,low:Int,high:Int):TreeNode? {`
	`13`	`+if(root==null)`
	`14`	`+returnnull`
	`15`	+if(root.`val`< low)
	`16`	`+return trimBST(root.right, low, high)`
	`17`	+elseif(root.`val`> high)
	`18`	`+return trimBST(root.left, low, high)`
	`19`	`+ root.left= trimBST(root.left, low, high)`
	`20`	`+ root.right= trimBST(root.right, low, high)`
	`21`	`+return root`
	`22`	`+ }`
	`23`	`+}`

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