Java | Leetcode Java题解之第530题二叉搜索树的最小绝对差
题目:
题解:
class Solution {
int pre;
int ans;
public int getMinimumDifference(TreeNode root) {
ans = Integer.MAX_VALUE;
pre = -1;
dfs(root);
return ans;
}
public void dfs(TreeNode root) {
if (root == null) {
return;
}
dfs(root.left);
if (pre == -1) {
pre = root.val;
} else {
ans = Math.min(ans, root.val - pre);
pre = root.val;
}
dfs(root.right);
}
}
原文地址:https://blog.csdn.net/m0_57195758/article/details/143460213
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