[
  {
    "id": 1,
    "slug": "two-sum",
    "title": "两数之和",
    "difficulty": "简单",
    "category": "哈希"
  },
  {
    "id": 2,
    "slug": "group-anagrams",
    "title": "字母异位词分组",
    "difficulty": "中等",
    "category": "哈希"
  },
  {
    "id": 3,
    "slug": "longest-consecutive-sequence",
    "title": "最长连续序列",
    "difficulty": "中等",
    "category": "哈希"
  },
  {
    "id": 4,
    "slug": "move-zeros",
    "title": "移动零",
    "difficulty": "简单",
    "category": "双指针"
  },
  {
    "id": 5,
    "slug": "container-with-most-water",
    "title": "盛最多水的容器",
    "difficulty": "中等",
    "category": "双指针"
  },
  {
    "id": 6,
    "slug": "3sum",
    "title": "三数之和",
    "difficulty": "中等",
    "category": "双指针"
  },
  {
    "id": 7,
    "slug": "trapping-rain-water",
    "title": "接雨水",
    "difficulty": "困难",
    "category": "双指针"
  },
  {
    "id": 8,
    "slug": "longest-substring-without-repeating-chars",
    "title": "无重复字符的最长子串",
    "difficulty": "中等",
    "category": "滑动窗口"
  },
  {
    "id": 9,
    "slug": "find-all-anagrams-in-a-string",
    "title": "找到字符串中所有字母异位词",
    "difficulty": "中等",
    "category": "滑动窗口"
  },
  {
    "id": 10,
    "slug": "subarray-sum-equals-k",
    "title": "和为 K 的子数组",
    "difficulty": "中等",
    "category": "子串"
  },
  {
    "id": 11,
    "slug": "sliding-window-maximum",
    "title": "滑动窗口最大值",
    "difficulty": "困难",
    "category": "子串"
  },
  {
    "id": 12,
    "slug": "minimum-window-substring",
    "title": "最小覆盖子串",
    "difficulty": "困难",
    "category": "子串"
  },
  {
    "id": 13,
    "slug": "maximum-subarray",
    "title": "最大子数组和",
    "difficulty": "中等",
    "category": "普通数组"
  },
  {
    "id": 14,
    "slug": "merge-intervals",
    "title": "合并区间",
    "difficulty": "中等",
    "category": "普通数组"
  },
  {
    "id": 15,
    "slug": "rotate-array",
    "title": "轮转数组",
    "difficulty": "中等",
    "category": "普通数组"
  },
  {
    "id": 16,
    "slug": "product-of-array-except-self",
    "title": "除自身以外数组的乘积",
    "difficulty": "中等",
    "category": "普通数组"
  },
  {
    "id": 17,
    "slug": "first-missing-positive",
    "title": "缺失的第一个正数",
    "difficulty": "困难",
    "category": "普通数组"
  },
  {
    "id": 18,
    "slug": "set-matrix-zeroes",
    "title": "矩阵置零",
    "difficulty": "中等",
    "category": "矩阵"
  },
  {
    "id": 19,
    "slug": "spiral-matrix",
    "title": "螺旋矩阵",
    "difficulty": "中等",
    "category": "矩阵"
  },
  {
    "id": 20,
    "slug": "rotate-image",
    "title": "旋转图像",
    "difficulty": "中等",
    "category": "矩阵"
  },
  {
    "id": 21,
    "slug": "search-a-2d-matrix-ii",
    "title": "搜索二维矩阵 II",
    "difficulty": "中等",
    "category": "矩阵"
  },
  {
    "id": 22,
    "slug": "intersection-of-two-linked-lists",
    "title": "相交链表",
    "difficulty": "简单",
    "category": "链表"
  },
  {
    "id": 23,
    "slug": "reverse-linked-list",
    "title": "反转链表",
    "difficulty": "简单",
    "category": "链表"
  },
  {
    "id": 24,
    "slug": "palindrome-linked-list",
    "title": "回文链表",
    "difficulty": "简单",
    "category": "链表"
  },
  {
    "id": 25,
    "slug": "linked-list-cycle",
    "title": "环形链表",
    "difficulty": "简单",
    "category": "链表"
  },
  {
    "id": 26,
    "slug": "linked-list-cycle-ii",
    "title": "环形链表 II",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 27,
    "slug": "merge-two-sorted-lists",
    "title": "合并两个有序链表",
    "difficulty": "简单",
    "category": "链表"
  },
  {
    "id": 28,
    "slug": "add-two-numbers",
    "title": "两数相加",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 29,
    "slug": "remove-nth-node-from-end-of-list",
    "title": "删除链表的倒数第 N 个结点",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 30,
    "slug": "swap-nodes-in-pairs",
    "title": "两两交换链表中的节点",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 31,
    "slug": "reverse-nodes-in-k-group",
    "title": "K 个一组翻转链表",
    "difficulty": "困难",
    "category": "链表"
  },
  {
    "id": 32,
    "slug": "copy-list-with-random-pointer",
    "title": "随机链表的复制",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 33,
    "slug": "sort-list",
    "title": "排序链表",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 34,
    "slug": "merge-k-sorted-lists",
    "title": "合并 K 个升序链表",
    "difficulty": "困难",
    "category": "链表"
  },
  {
    "id": 35,
    "slug": "lru-cache",
    "title": "LRU 缓存",
    "difficulty": "中等",
    "category": "链表"
  },
  {
    "id": 36,
    "slug": "binary-tree-inorder-traversal",
    "title": "二叉树的中序遍历",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 37,
    "slug": "maximum-depth-of-binary-tree",
    "title": "二叉树的最大深度",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 38,
    "slug": "invert-binary-tree",
    "title": "翻转二叉树",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 39,
    "slug": "symmetric-tree",
    "title": "对称二叉树",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 40,
    "slug": "diameter-of-binary-tree",
    "title": "二叉树的直径",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 41,
    "slug": "binary-tree-level-order-traversal",
    "title": "二叉树的层序遍历",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 42,
    "slug": "convert-sorted-array-to-bst",
    "title": "将有序数组转换为二叉搜索树",
    "difficulty": "简单",
    "category": "二叉树"
  },
  {
    "id": 43,
    "slug": "validate-binary-search-tree",
    "title": "验证二叉搜索树",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 44,
    "slug": "kth-smallest-element-in-a-bst",
    "title": "二叉搜索树中第 K 小的元素",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 45,
    "slug": "binary-tree-right-side-view",
    "title": "二叉树的右视图",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 46,
    "slug": "flatten-binary-tree-to-linked-list",
    "title": "二叉树展开为链表",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 47,
    "slug": "construct-binary-tree-from-preorder-and-inorder",
    "title": "从前序与中序遍历序列构造二叉树",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 48,
    "slug": "path-sum-iii",
    "title": "路径总和 III",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 49,
    "slug": "lowest-common-ancestor-of-a-binary-tree",
    "title": "二叉树的最近公共祖先",
    "difficulty": "中等",
    "category": "二叉树"
  },
  {
    "id": 50,
    "slug": "binary-tree-maximum-path-sum",
    "title": "二叉树中的最大路径和",
    "difficulty": "困难",
    "category": "二叉树"
  },
  {
    "id": 51,
    "slug": "number-of-islands",
    "title": "岛屿数量",
    "difficulty": "中等",
    "category": "图论"
  },
  {
    "id": 52,
    "slug": "rotting-oranges",
    "title": "腐烂的橘子",
    "difficulty": "中等",
    "category": "图论"
  },
  {
    "id": 53,
    "slug": "course-schedule",
    "title": "课程表",
    "difficulty": "中等",
    "category": "图论"
  },
  {
    "id": 54,
    "slug": "implement-trie-prefix-tree",
    "title": "实现 Trie (前缀树)",
    "difficulty": "中等",
    "category": "图论"
  },
  {
    "id": 55,
    "slug": "permutations",
    "title": "全排列",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 56,
    "slug": "subsets",
    "title": "子集",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 57,
    "slug": "letter-combinations-of-a-phone-number",
    "title": "电话号码的字母组合",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 58,
    "slug": "combination-sum",
    "title": "组合总和",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 59,
    "slug": "generate-parentheses",
    "title": "括号生成",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 60,
    "slug": "word-search",
    "title": "单词搜索",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 61,
    "slug": "palindrome-partitioning",
    "title": "分割回文串",
    "difficulty": "中等",
    "category": "回溯"
  },
  {
    "id": 62,
    "slug": "n-queens",
    "title": "N 皇后",
    "difficulty": "困难",
    "category": "回溯"
  },
  {
    "id": 63,
    "slug": "search-insert-position",
    "title": "搜索插入位置",
    "difficulty": "简单",
    "category": "二分查找"
  },
  {
    "id": 64,
    "slug": "search-a-2d-matrix",
    "title": "搜索二维矩阵",
    "difficulty": "中等",
    "category": "二分查找"
  },
  {
    "id": 65,
    "slug": "find-first-and-last-position-of-element-in-sorted-array",
    "title": "在排序数组中查找元素的第一个和最后一个位置",
    "difficulty": "中等",
    "category": "二分查找"
  },
  {
    "id": 66,
    "slug": "search-in-rotated-sorted-array",
    "title": "搜索旋转排序数组",
    "difficulty": "中等",
    "category": "二分查找"
  },
  {
    "id": 67,
    "slug": "find-minimum-in-rotated-sorted-array",
    "title": "寻找旋转排序数组中的最小值",
    "difficulty": "中等",
    "category": "二分查找"
  },
  {
    "id": 68,
    "slug": "median-of-two-sorted-arrays",
    "title": "寻找两个正序数组的中位数",
    "difficulty": "困难",
    "category": "二分查找"
  },
  {
    "id": 69,
    "slug": "valid-parentheses",
    "title": "有效的括号",
    "difficulty": "简单",
    "category": "栈"
  },
  {
    "id": 70,
    "slug": "min-stack",
    "title": "最小栈",
    "difficulty": "中等",
    "category": "栈"
  },
  {
    "id": 71,
    "slug": "decode-string",
    "title": "字符串解码",
    "difficulty": "中等",
    "category": "栈"
  },
  {
    "id": 72,
    "slug": "daily-temperatures",
    "title": "每日温度",
    "difficulty": "中等",
    "category": "栈"
  },
  {
    "id": 73,
    "slug": "largest-rectangle-in-histogram",
    "title": "柱状图中最大的矩形",
    "difficulty": "困难",
    "category": "栈"
  },
  {
    "id": 74,
    "slug": "kth-largest-element-in-an-array",
    "title": "数组中的第K个最大元素",
    "difficulty": "中等",
    "category": "堆"
  },
  {
    "id": 75,
    "slug": "top-k-frequent-elements",
    "title": "前 K 个高频元素",
    "difficulty": "中等",
    "category": "堆"
  },
  {
    "id": 76,
    "slug": "find-median-from-data-stream",
    "title": "数据流的中位数",
    "difficulty": "困难",
    "category": "堆"
  },
  {
    "id": 77,
    "slug": "best-time-to-buy-and-sell-stock",
    "title": "买卖股票的最佳时机",
    "difficulty": "简单",
    "category": "贪心"
  },
  {
    "id": 78,
    "slug": "jump-game",
    "title": "跳跃游戏",
    "difficulty": "中等",
    "category": "贪心"
  },
  {
    "id": 79,
    "slug": "jump-game-ii",
    "title": "跳跃游戏 II",
    "difficulty": "中等",
    "category": "贪心"
  },
  {
    "id": 80,
    "slug": "partition-labels",
    "title": "划分字母区间",
    "difficulty": "中等",
    "category": "贪心"
  },
  {
    "id": 81,
    "slug": "climbing-stairs",
    "title": "爬楼梯",
    "difficulty": "简单",
    "category": "动态规划"
  },
  {
    "id": 82,
    "slug": "pascals-triangle",
    "title": "杨辉三角",
    "difficulty": "简单",
    "category": "动态规划"
  },
  {
    "id": 83,
    "slug": "house-robber",
    "title": "打家劫舍",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 84,
    "slug": "perfect-squares",
    "title": "完全平方数",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 85,
    "slug": "coin-change",
    "title": "零钱兑换",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 86,
    "slug": "word-break",
    "title": "单词拆分",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 87,
    "slug": "longest-increasing-subsequence",
    "title": "最长递增子序列",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 88,
    "slug": "maximum-product-subarray",
    "title": "乘积最大子数组",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 89,
    "slug": "partition-equal-subset-sum",
    "title": "分割等和子集",
    "difficulty": "中等",
    "category": "动态规划"
  },
  {
    "id": 90,
    "slug": "longest-valid-parentheses",
    "title": "最长有效括号",
    "difficulty": "困难",
    "category": "动态规划"
  },
  {
    "id": 91,
    "slug": "unique-paths",
    "title": "不同路径",
    "difficulty": "中等",
    "category": "多维动态规划"
  },
  {
    "id": 92,
    "slug": "minimum-path-sum",
    "title": "最小路径和",
    "difficulty": "中等",
    "category": "多维动态规划"
  },
  {
    "id": 93,
    "slug": "longest-palindromic-substring",
    "title": "最长回文子串",
    "difficulty": "中等",
    "category": "多维动态规划"
  },
  {
    "id": 94,
    "slug": "longest-common-subsequence",
    "title": "最长公共子序列",
    "difficulty": "中等",
    "category": "多维动态规划"
  },
  {
    "id": 95,
    "slug": "edit-distance",
    "title": "编辑距离",
    "difficulty": "中等",
    "category": "多维动态规划"
  },
  {
    "id": 96,
    "slug": "single-number",
    "title": "只出现一次的数字",
    "difficulty": "简单",
    "category": "技巧"
  },
  {
    "id": 97,
    "slug": "majority-element",
    "title": "多数元素",
    "difficulty": "简单",
    "category": "技巧"
  },
  {
    "id": 98,
    "slug": "sort-colors",
    "title": "颜色分类",
    "difficulty": "中等",
    "category": "技巧"
  },
  {
    "id": 99,
    "slug": "next-permutation",
    "title": "下一个排列",
    "difficulty": "中等",
    "category": "技巧"
  },
  {
    "id": 100,
    "slug": "find-the-duplicate-number",
    "title": "寻找重复数",
    "difficulty": "中等",
    "category": "技巧"
  }
]