题目:
Given two binary trees, write a function to check if they are equal or not.
Two binary trees are considered equal if they are structurally identical and the nodes have the same value.
解题:
依次遍历每一个点,如果都为Null或是都不为null且值相等 返回true,一个为Null另一个不为Null返回false 两个都不为null但值不相等返回false。
代码:
public static boolean isSameTree(TreeNode p, TreeNode q) { if(p==null&&q==null) return true; if(p==null||q==null) return false; if(p.val!=q.val) return false; return isSameTree(p.left, q.left)&&isSameTree(p.right, q.right); }
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时间: 2024-10-14 05:23:06