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Solve 100. Same Tree

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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`	`+class Solution {`
	`12`	`+`
	`13`	`+ fun isSameTree(p: TreeNode?, q: TreeNode?): Boolean {`
	`14`	`+ if (p == null && q == null) {`
	`15`	`+ return true`
	`16`	`+ }`
	`17`	`+`
	`18`	`+ if (p != null && q != null) {`
	`19`	+ return p.`val` == q.`val` &&
	`20`	`+ isSameTree(p.left, q.left) &&`
	`21`	`+ isSameTree(p.right, q.right)`
	`22`	`+ }`
	`23`	`+`
	`24`	`+ return false`
	`25`	`+ }`
	`26`	`+`
	`27`	`+}`

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