g0001_0100.s0100_same_tree.Solution Maven / Gradle / Ivy
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Java-based LeetCode algorithm problem solutions, regularly updated
package g0001_0100.s0100_same_tree;
// #Easy #Depth_First_Search #Breadth_First_Search #Tree #Binary_Tree #Level_2_Day_15_Tree
// #Udemy_Tree_Stack_Queue #2022_06_21_Time_0_ms_(100.00%)_Space_40.9_MB_(78.42%)
import com_github_leetcode.TreeNode;
/*
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode() {}
* TreeNode(int val) { this.val = val; }
* TreeNode(int val, TreeNode left, TreeNode right) {
* this.val = val;
* this.left = left;
* this.right = right;
* }
* }
*/
public class Solution {
public boolean isSameTree(TreeNode p, TreeNode q) {
if (p == null || q == null) {
return p == null && q == null;
}
boolean b1 = isSameTree(p.left, q.left);
boolean b2 = isSameTree(p.right, q.right);
return p.val == q.val && b1 && b2;
}
}