{"id":418960,"date":"2021-03-20T16:11:41","date_gmt":"2021-03-20T08:11:41","guid":{"rendered":"http:\/\/4563.org\/?p=418960"},"modified":"2021-03-20T16:11:41","modified_gmt":"2021-03-20T08:11:41","slug":"%e9%ab%98%e9%a2%91%e9%a2%98dp-%e7%bb%8f%e5%85%b8%e9%a2%98%e7%9b%ae-house-robber","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=418960","title":{"rendered":"[\u9ad8\u9891\u9898]dp \u7ecf\u5178\u9898\u76ee House Robber"},"content":{"rendered":"
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[\u9ad8\u9891\u9898]dp \u7ecf\u5178\u9898\u76ee House Robber <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/i> 4<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u4e0d\u5f97\u4e0d\u8bf4\uff0c\u5237\u9898\u5df2\u7ecf\u548c\u722c\u5c71\u3001\u6e9c\u5a03\u4e00\u6837\uff0c\u6210\u4e3a\u6e7e\u533a\u4e09\u4fd7\uff0c\u57fa\u672c\u51e0\u4e2a\u6e7e\u533a\u7684\u5de5\u7a0b\u5e08\u78b0\u5728\u4e00\u8d77\uff0c\u8ba8\u8bba\u7684\u8bdd\u9898\u603b\u8df3\u4e0d\u51fa\u8fd9\u4e2a\u5708\u3002\u722c\u5c71\uff0c\u54e6\u4e0d\uff0c\u5237\u9898\u4f5c\u4e3a\u4e00\u4e2a\u8d2f\u7a7f\u7801\u519c\u6574\u4e2a\u804c\u4e1a\u751f\u6daf\u7684\u5fc5\u987b\u54c1\uff08\u5c31\u7b97\u662f\u6211\u76ee\u524d\u5446\u7684\u5fae\u8f6f\u8c37\u6b4c\u8fd9\u79cd\u517b\u8001\u516c\u53f8\u4e5f\u603b\u5f97\u8df3\u4e00\u8df3\uff0c\u6bd5\u7adf\u96ea\u82b1\u7684\u5927\u5305\u88f9\u662f\u771f\u9999\u554a\uff09\uff0c\u51e0\u5e74\u6765\u57fa\u672c\u6bcf\u5929\u4e0d\u95f4\u65ad\u7684\u5237\uff0c\u7b97\u662f\u5bf9\u8fd9\u4e00\u5757\u7565\u6709\u5fc3\u5f97\u3002\u5e16\u5b50\u7684\u524d\u534a\u90e8\u5206\u60f3\u5206\u4eab\u4e00\u4e9b\u6211\u4f5c\u4e3a\u9762\u8bd5\u5b98\u7684\u5e38\u51fa\u7684\u4e00\u4e9b\u7ecf\u5178\u9898\u76ee\uff0c\u4ee5\u53ca\u9898\u76ee\u601d\u8def\u7684\u89e3\u6790\u4ee5\u53ca\u4e00\u4e9b\u540c\u7c7b\u9898\u7684\u5f52\u7eb3\uff0c\u5e16\u5b50\u7684\u540e\u534a\u90e8\u5206\u6211\u4f1a\u53c2\u8003\u575b\u53cb\u4eec\u7684\u7559\u8a00\u548c\u62cd\u7816\uff0c\u6765\u51b3\u5b9a\u540e\u9762\u7684\u8d70\u5411<\/p>\n

\u5e16\u5b50\u4f1a\u957f\u671f\u4fdd\u6301\u66f4\u65b0\uff0c\u53ea\u8981\u662f\u5e26\u5a03\u7684\u95f4\u9699\u5c31\u4f1a\u5077\u5077\u4e0a\u6765\u66f4\u4e00\u4e0b\uff0c\u5c3d\u91cf\u4fdd\u6301\u6bcf\u5468\u4e24\u66f4\u3002<\/p>\n

\u7531\u4e8e\u592a\u591a\u4eba\u52a0\u6211 VX\uff0c\u6211\u4e5f\u521b\u5efa\u4e86\u4e00\u4e2a\u7b97\u6cd5\u5de5\u4f5c\u4ea4\u6d41\u7fa4\uff0c\u5927\u5bb6\u611f\u5174\u8da3\u53ef\u4ee5\u52a0\u6211\u62c9\u4f60\u8fdb\u7fa4<\/p>\n

\u6211\u7684 VX\uff1asxxzs3998 \u4e0d\u7ba1\u662f\u5177\u4f53\u7684\u9898\u76ee\u8ba8\u8bba\u8fd8\u662f\u7ed9\u5e16\u5b50\u7684\u5efa\u8bae\u548c\u62cd\u7816\uff0c\u6216\u8005\u60f3\u8fdb\u7fa4\u90fd\u6b22\u8fce\u6dfb\u52a0\uff08\u8bb0\u5f97\u52a0\u6211\u8981\u5907\u6ce8 v2 \uff09<\/p>\n

\u672c\u671f\u6211\u4eec\u5206\u4eab dp \u7ecf\u5178\u9898\u76ee–\u6253\u5bb6\u52ab\u820d\u95ee\u9898
\u6253\u5bb6\u52ab\u820d\u7cfb\u5217\u603b\u5171\u6709\u4e09\u9053\u9898\u76ee\uff0c\u5c42\u5c42\u9012\u8fdb\u3002\u7b2c\u4e00\u9053\u662f\u6bd4\u8f83\u6807\u51c6\u7684\u52a8\u6001\u89c4\u5212\u95ee\u9898\uff0c\u800c\u7b2c\u4e8c\u9053\u878d\u5165\u4e86\u73af\u5f62\u6570\u7ec4\u7684\u6761\u4ef6\uff0c\u7b2c\u4e09\u9053\u5219\u8ba9\u76d7\u8d3c\u5728\u4e8c\u53c9\u6811\u4e0a\u6253\u52ab <\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (5<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    House Robber I
    \u4f60\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u5c0f\u5077\uff0c\u8ba1\u5212\u5077\u7a83\u6cbf\u8857\u7684\u623f\u5c4b\u3002\u6bcf\u95f4\u623f\u5185\u90fd\u85cf\u6709\u4e00\u5b9a\u7684\u73b0\u91d1\uff0c\u5f71\u54cd\u4f60\u5077\u7a83\u7684\u552f\u4e00\u5236\u7ea6\u56e0\u7d20\u5c31\u662f\u76f8\u90bb\u7684\u623f\u5c4b\u88c5\u6709\u76f8\u4e92\u8fde\u901a\u7684\u9632\u76d7\u7cfb\u7edf\uff0c\u5982\u679c\u4e24\u95f4\u76f8\u90bb\u7684\u623f\u5c4b\u5728\u540c\u4e00\u665a\u4e0a\u88ab\u5c0f\u5077\u95ef\u5165\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u62a5\u8b66\u3002
    \u7ed9\u5b9a\u4e00\u4e2a\u4ee3\u8868\u6bcf\u4e2a\u623f\u5c4b\u5b58\u653e\u91d1\u989d\u7684\u975e\u8d1f\u6574\u6570\u6570\u7ec4\uff0c\u8ba1\u7b97\u4f60 \u4e0d\u89e6\u52a8\u8b66\u62a5\u88c5\u7f6e\u7684\u60c5\u51b5\u4e0b \uff0c\u4e00\u591c\u4e4b\u5185\u80fd\u591f\u5077\u7a83\u5230\u7684\u6700\u9ad8\u91d1\u989d\u3002<\/p>\n

    \u00a0
    \u793a\u4f8b 1\uff1a
    \u8f93\u5165\uff1a[1,2,3,1]
    \u8f93\u51fa\uff1a4
    \u89e3\u91ca\uff1a\u5077\u7a83 1 \u53f7\u623f\u5c4b (\u91d1\u989d = 1) \uff0c\u7136\u540e\u5077\u7a83 3 \u53f7\u623f\u5c4b (\u91d1\u989d = 3)\u3002
    \u00a0 \u5077\u7a83\u5230\u7684\u6700\u9ad8\u91d1\u989d = 1 + 3 = 4 \u3002<\/p>\n

    \u793a\u4f8b 2\uff1a
    \u8f93\u5165\uff1a[2,7,9,3,1]
    \u8f93\u51fa\uff1a12
    \u89e3\u91ca\uff1a\u5077\u7a83 1 \u53f7\u623f\u5c4b (\u91d1\u989d = 2), \u5077\u7a83 3 \u53f7\u623f\u5c4b (\u91d1\u989d = 9)\uff0c\u63a5\u7740\u5077\u7a83 5 \u53f7\u623f\u5c4b (\u91d1\u989d = 1)\u3002
    \u00a0 \u5077\u7a83\u5230\u7684\u6700\u9ad8\u91d1\u989d = 2 + 9 + 1 = 12 \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u89e3\u51b3\u52a8\u6001\u89c4\u5212\u95ee\u9898\u5c31\u662f\u627e\u300c\u72b6\u6001\u300d\u548c\u300c\u9009\u62e9\u300d\u3002<\/p>\n

    \u4ece\u5de6\u5230\u53f3\u8d70\u8fc7\u8fd9\u4e00\u6392\u623f\u5b50\uff0c\u5728\u6bcf\u95f4\u623f\u5b50\u524d\u90fd\u6709\u4e24\u79cd\u9009\u62e9\uff1a\u62a2\u6216\u8005\u4e0d\u62a2\u3002<\/p>\n

    \u5982\u679c\u4f60\u62a2\u4e86\u8fd9\u95f4\u623f\u5b50\uff0c\u90a3\u4e48\u4f60\u80af\u5b9a\u4e0d\u80fd\u62a2\u76f8\u90bb\u7684\u4e0b\u4e00\u95f4\u623f\u5b50\u4e86\uff0c\u53ea\u80fd\u4ece\u4e0b\u4e0b\u95f4\u623f\u5b50\u5f00\u59cb\u505a\u9009\u62e9\u3002<\/p>\n

    \u5982\u679c\u4f60\u4e0d\u62a2\u8fd9\u95f4\u623f\u5b50\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u8d70\u5230\u4e0b\u4e00\u95f4\u623f\u5b50\u524d\uff0c\u7ee7\u7eed\u505a\u9009\u62e9\u3002<\/p>\n

    \u5f53\u4f60\u8d70\u8fc7\u4e86\u6700\u540e\u4e00\u95f4\u623f\u5b50\u540e\uff0c\u4f60\u5c31\u6ca1\u5f97\u62a2\u4e86\uff0c\u80fd\u62a2\u5230\u7684\u94b1\u663e\u7136\u662f 0 \uff08 base case \uff09\u3002<\/p>\n

    \u4ee5\u4e0a\u7684\u903b\u8f91\u5f88\u7b80\u5355\u5427\uff0c\u5176\u5b9e\u5df2\u7ecf\u660e\u786e\u4e86\u300c\u72b6\u6001\u300d\u548c\u300c\u9009\u62e9\u300d\uff1a\u4f60\u9762\u524d\u623f\u5b50\u7684\u7d22\u5f15\u5c31\u662f\u72b6\u6001\uff0c\u62a2\u548c\u4e0d\u62a2\u5c31\u662f\u9009\u62e9\u3002<\/p>\n

    \u5728\u4e24\u4e2a\u9009\u62e9\u4e2d\uff0c\u6bcf\u6b21\u90fd\u9009\u66f4\u5927\u7684\u7ed3\u679c\uff0c\u6700\u540e\u5f97\u5230\u7684\u5c31\u662f\u6700\u591a\u80fd\u62a2\u5230\u7684 money\uff1a
    \/\/ \u4e3b\u51fd\u6570
    public int rob(int[] nums) {
    return dp(nums, 0);
    }
    \/\/ \u8fd4\u56de nums[start..] \u80fd\u62a2\u5230\u7684\u6700\u5927\u503c
    private int dp(int[] nums, int start) {
    if (start >= nums.length) {
    return 0;
    }<\/p>\n

    int res = Math.max(
    \/\/ \u4e0d\u62a2\uff0c\u53bb\u4e0b\u5bb6
    dp(nums, start + 1),
    \/\/ \u62a2\uff0c\u53bb\u4e0b\u4e0b\u5bb6
    nums[start] + dp(nums, start + 2)
    );
    return res;
    }<\/p>\n

    \u660e\u786e\u4e86\u72b6\u6001\u8f6c\u79fb\uff0c\u5c31\u53ef\u4ee5\u53d1\u73b0\u5bf9\u4e8e\u540c\u4e00`start`\u4f4d\u7f6e\uff0c\u662f\u5b58\u5728\u91cd\u53e0\u5b50\u95ee\u9898\u7684
    \u76d7\u8d3c\u6709\u591a\u79cd\u9009\u62e9\u53ef\u4ee5\u8d70\u5230\u8fd9\u4e2a\u4f4d\u7f6e\uff0c\u5982\u679c\u6bcf\u6b21\u5230\u8fd9\u90fd\u8fdb\u5165\u9012\u5f52\uff0c\u6240\u4ee5\u8bf4\u5b58\u5728\u91cd\u53e0\u5b50\u95ee\u9898\uff0c\u53ef\u4ee5\u7528\u5907\u5fd8\u5f55\u8fdb\u884c\u4f18\u5316\uff1a
    private int[] memo;
    \/\/ \u4e3b\u51fd\u6570
    public int rob(int[] nums) {
    \/\/ \u521d\u59cb\u5316\u5907\u5fd8\u5f55
    memo = new int[nums.length];
    Arrays.fill(memo, -1);
    \/\/ \u5f3a\u76d7\u4ece\u7b2c 0 \u95f4\u623f\u5b50\u5f00\u59cb\u62a2\u52ab
    return dp(nums, 0);
    }<\/p>\n

    \/\/ \u8fd4\u56de dp[start..] \u80fd\u62a2\u5230\u7684\u6700\u5927\u503c
    private int dp(int[] nums, int start) {
    if (start >= nums.length) {
    return 0;
    }
    \/\/ \u907f\u514d\u91cd\u590d\u8ba1\u7b97
    if (memo[start] != -1) return memo[start];<\/p>\n

    int res = Math.max(dp(nums, start + 1),
    nums[start] + dp(nums, start + 2));
    \/\/ \u8bb0\u5165\u5907\u5fd8\u5f55
    memo[start] = res;
    return res;
    }<\/p>\n

    \u8fd9\u5c31\u662f\u81ea\u9876\u5411\u4e0b\u7684\u52a8\u6001\u89c4\u5212\u89e3\u6cd5\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u7565\u4f5c\u4fee\u6539\uff0c\u5199\u51fa\u81ea\u5e95\u5411\u4e0a\u7684\u89e3\u6cd5\uff1a
    int rob(int[] nums) {
    int n = nums.length;
    \/\/ dp[i] = x \u8868\u793a\uff1a
    \/\/ \u4ece\u7b2c i \u95f4\u623f\u5b50\u5f00\u59cb\u62a2\u52ab\uff0c\u6700\u591a\u80fd\u62a2\u5230\u7684\u94b1\u4e3a x
    \/\/ base case: dp[n] = 0
    int[] dp = new int[n + 2];
    for (int i = n – 1; i >= 0; i–) {
    dp[i] = Math.max(dp[i + 1], nums[i] + dp[i + 2]);
    }
    return dp[0];
    }<\/p>\n

    \u6211\u4eec\u53c8\u53d1\u73b0\u72b6\u6001\u8f6c\u79fb\u53ea\u548c dp[i]\u6700\u8fd1\u7684\u4e24\u4e2a\u72b6\u6001\u6709\u5173\uff0c\u6240\u4ee5\u53ef\u4ee5\u8fdb\u4e00\u6b65\u4f18\u5316\uff0c\u5c06\u7a7a\u95f4\u590d\u6742\u5ea6\u964d\u4f4e\u5230 O(1)
    int rob(int[] nums) {
    int n = nums.length;
    \/\/ \u8bb0\u5f55 dp[i+1] \u548c dp[i+2]
    int dp_i_1 = 0, dp_i_2 = 0;
    \/\/ \u8bb0\u5f55 dp[i]
    int dp_i = 0;
    for (int i = n – 1; i >= 0; i–) {
    dp_i = Math.max(dp_i_1, nums[i] + dp_i_2);
    dp_i_2 = dp_i_1;
    dp_i_1 = dp_i;
    }
    return dp_i;
    } <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    House Robber II<\/p>\n

    \u8fd9\u9053\u9898\u76ee\u548c\u7b2c\u4e00\u9053\u63cf\u8ff0\u57fa\u672c\u4e00\u6837\uff0c\u5f3a\u76d7\u4f9d\u7136\u4e0d\u80fd\u62a2\u52ab\u76f8\u90bb\u7684\u623f\u5b50\uff0c\u8f93\u5165\u4f9d\u7136\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u4f46\u662f\u544a\u8bc9\u4f60\u8fd9\u4e9b\u623f\u5b50\u4e0d\u662f\u4e00\u6392\uff0c\u800c\u662f\u56f4\u6210\u4e86\u4e00\u4e2a\u5708\u3002<\/p>\n

    \u4e5f\u5c31\u662f\u8bf4\uff0c\u73b0\u5728\u7b2c\u4e00\u95f4\u623f\u5b50\u548c\u6700\u540e\u4e00\u95f4\u623f\u5b50\u4e5f\u76f8\u5f53\u4e8e\u662f\u76f8\u90bb\u7684\uff0c\u4e0d\u80fd\u540c\u65f6\u62a2\u3002\u6bd4\u5982\u8bf4\u8f93\u5165\u6570\u7ec4`nums=[2,3,2]`\uff0c\u7b97\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u5e94\u8be5\u662f 3 \u800c\u4e0d\u662f 4\uff0c\u56e0\u4e3a\u5f00\u5934\u548c\u7ed3\u5c3e\u4e0d\u80fd\u540c\u65f6\u88ab\u62a2\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u9996\u5148\uff0c\u9996\u5c3e\u623f\u95f4\u4e0d\u80fd\u540c\u65f6\u88ab\u62a2\uff0c\u90a3\u4e48\u53ea\u53ef\u80fd\u6709\u4e24\u79cd\u4e0d\u540c\u60c5\u51b5\uff1a<\/p>\n

    + \u7b2c\u4e00\u95f4\u623f\u95f4\u88ab\u4e0d\u88ab\u62a2\u65e0\u6240\u8c13\uff0c\u6700\u540e\u4e00\u95f4\u4e0d\u88ab\u62a2\uff08 robRange(nums, 0, n – 2)\uff09
    + \u7b2c\u4e00\u95f4\u4e0d\u88ab\u62a2\uff0c\u6700\u540e\u4e00\u95f4\u88ab\u4e0d\u88ab\u62a2\u65e0\u6240\u8c13\uff08 robRange(nums, 1, n – 1)\uff09<\/p>\n

    \u6240\u4ee5\u53ea\u9700\u5bf9\u4e4b\u524d\u7684\u89e3\u6cd5\u7a0d\u4f5c\u4fee\u6539\u5373\u53ef\uff1a
    public int rob(int[] nums) {
    int n = nums.length;
    if (n == 1) return nums[0];
    return Math.max(robRange(nums, 0, n – 2),
    robRange(nums, 1, n – 1));
    }<\/p>\n

    \/\/ \u4ec5\u8ba1\u7b97\u95ed\u533a\u95f4 [start,end] \u7684\u6700\u4f18\u7ed3\u679c
    int robRange(int[] nums, int start, int end) {
    int n = nums.length;
    int dp_i_1 = 0, dp_i_2 = 0;
    int dp_i = 0;
    for (int i = end; i >= start; i–) {
    dp_i = Math.max(dp_i_1, nums[i] + dp_i_2);
    dp_i_2 = dp_i_1;
    dp_i_1 = dp_i;
    }
    return dp_i;
    } <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youthes <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    House Robber III<\/p>\n

    \u7b2c\u4e09\u9898\u53c8\u60f3\u6cd5\u8bbe\u6cd5\u5730\u53d8\u82b1\u6837\u4e86\uff0c\u6b64\u5f3a\u76d7\u53d1\u73b0\u73b0\u5728\u9762\u5bf9\u7684\u623f\u5b50\u4e0d\u662f\u4e00\u6392\uff0c\u4e0d\u662f\u4e00\u5708\uff0c\u800c\u662f\u4e00\u68f5\u4e8c\u53c9\u6811\uff01\u623f\u5b50\u5728\u4e8c\u53c9\u6811\u7684\u8282\u70b9\u4e0a\uff0c\u76f8\u8fde\u7684\u4e24\u4e2a\u623f\u5b50\u4e0d\u80fd\u540c\u65f6\u88ab\u62a2\u52ab\uff1a<\/p>\n

    \u793a\u4f8b 1:<\/p>\n

    \u8f93\u5165: [3,2,3,null,3,null,1]<\/p>\n

    3
    \/
    2 3<\/p>\n

    3 1<\/p>\n

    \u8f93\u51fa: 7
    \u89e3\u91ca:\u00a0\u5c0f\u5077\u4e00\u665a\u80fd\u591f\u76d7\u53d6\u7684\u6700\u9ad8\u91d1\u989d = 3 + 3 + 1 = 7.
    \u793a\u4f8b 2:<\/p>\n

    \u8f93\u5165: [3,4,5,1,3,null,1]<\/p>\n

    \u00a0 3
    \/
    4 5
    \/
    1 3 1<\/p>\n

    \u8f93\u51fa: 9
    \u89e3\u91ca:\u00a0\u5c0f\u5077\u4e00\u665a\u80fd\u591f\u76d7\u53d6\u7684\u6700\u9ad8\u91d1\u989d\u00a0= 4 + 5 = 9.<\/p>\n

    \u6574\u4f53\u7684\u601d\u8def\u5b8c\u5168\u6ca1\u53d8\uff0c\u8fd8\u662f\u505a\u62a2\u6216\u8005\u4e0d\u62a2\u7684\u9009\u62e9\uff0c\u53d6\u6536\u76ca\u8f83\u5927\u7684\u9009\u62e9\u3002\u751a\u81f3\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u6309\u8fd9\u4e2a\u5957\u8def\u5199\u51fa\u4ee3\u7801\uff1a<\/p>\n

    Map<TreeNode, Integer> memo = new HashMap<>();
    public int rob(TreeNode root) {
    if (root == null) return 0;
    \/\/ \u5229\u7528\u5907\u5fd8\u5f55\u6d88\u9664\u91cd\u53e0\u5b50\u95ee\u9898
    if (memo.containsKey(root))
    return memo.get(root);
    \/\/ \u62a2\uff0c\u7136\u540e\u53bb\u4e0b\u4e0b\u5bb6
    int do_it = root.val
    + (root.left == null ?
    0 : rob(root.left.left) + rob(root.left.right))
    + (root.right == null ?
    0 : rob(root.right.left) + rob(root.right.right));
    \/\/ \u4e0d\u62a2\uff0c\u7136\u540e\u53bb\u4e0b\u5bb6
    int not_do = rob(root.left) + rob(root.right);<\/p>\n

    int res = Math.max(do_it, not_do);
    memo.put(root, res);
    return res;
    }<\/p>\n

    \u8fd9\u9053\u9898\u5c31\u89e3\u51b3\u4e86\uff0c\u65f6\u95f4\u590d\u6742\u5ea6 O(N)\uff0c`N`\u4e3a\u6570\u7684\u8282\u70b9\u6570\u3002<\/p>\n

    \u8fd9\u6837\uff0c\u6253\u5bb6\u52ab\u820d\u7cfb\u5217\u95ee\u9898\u5c31\u5168\u90e8\u89e3\u51b3\u4e86\uff0c\u5176\u5b9e\u4e5f\u6ca1\u591a\u96be\u5427 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    [\u9ad8\u9891\u9898]dp \u7ecf\u5178\u9898\u76ee Hous…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/418960"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=418960"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/418960\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=418960"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=418960"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=418960"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}