二叉搜索树的后序遍历|算法专题

    function VerifySquenceOfBST(sequence) {
      if (sequence && sequence.length > 0) {
        var root = sequence[sequence.length - 1]
        for (var i = 0; i < sequence.length - 1; i++) {
          if (sequence[i] > root) {
            break;
          }
        }
        for (let j = i; j < sequence.length - 1; j++) {
          if (sequence[j] < root) {
            return false;
          }
        }
        var left = true;
        if (i > 0) {
          left = VerifySquenceOfBST(sequence.slice(0, i));
        }
        var right = true;
        if (i < sequence.length - 1) {
          right = VerifySquenceOfBST(sequence.slice(i, sequence.length - 1));
        }
        return left && right;
      }
    }