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validate-binary-search-tree

validate-binary-search-tree

作者: DaiMorph | 来源:发表于2019-05-28 10:11 被阅读0次
    class Solution {
    public:
        bool isValidBST(TreeNode *root) {
            return judge(root,INT_MIN,INT_MAX);
        }
        bool judge(TreeNode*root,int low,int high)
        {
            if(root==NULL)return true;
            return root->val>low&&root->val<high&&judge(root->left,low,root->val)&&judge(root->right,root->val,high);
        }
    };
    

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