alinaf

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     TreeNode *left;
 *     TreeNode *right;
 *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
 * };
 */
class Solution {

alinaf

body {
  background: #415a6c;
  margin: 0;
  font-family: 'Oswald';
}
.parallax-container {
  position: fixed;
  overflow: visible;
  width: 100%;
  height: 850px;