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LeetCode_00100.java
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46 lines (43 loc) · 1.24 KB
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package com.github.jerring.leetcode;
public class LeetCode_00100 {
// 递归版本
public boolean isSameTree(TreeNode p, TreeNode q) {
if (p == q) {
return true;
}
if (p == null || q == null) {
return false;
}
return p.val == q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
}
// 迭代版本
// public boolean isSameTree(TreeNode p, TreeNode q) {
// if (p == null && q == null) {
// return true;
// }
// if (p == null || q == null) {
// return false;
// }
// LinkedList<TreeNode> stack = new LinkedList<>();
// stack.push(p);
// stack.push(q);
// while (!stack.isEmpty()) {
// p = stack.pop();
// q = stack.pop();
// if (p == null && q == null) {
// continue;
// }
// if (p == null || q == null) {
// return false;
// }
// if (p.val != q.val) {
// return false;
// }
// stack.push(p.left);
// stack.push(q.left);
// stack.push(p.right);
// stack.push(q.right);
// }
// return true;
// }
}