{"id":194067,"date":"2020-11-01T06:52:16","date_gmt":"2020-10-31T22:52:16","guid":{"rendered":"http:\/\/4563.org\/?p=194067"},"modified":"2020-11-01T06:52:16","modified_gmt":"2020-10-31T22:52:16","slug":"%e6%80%8e%e4%b9%88%e4%bc%98%e9%9b%85%e5%9c%b0%e4%bd%bf%e7%94%a8-bottom-up-%e8%a7%a3%e5%86%b3-leetcode-39-combination-sum%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=194067","title":{"rendered":"\u600e\u4e48\u4f18\u96c5\u5730\u4f7f\u7528 bottom up \u89e3\u51b3 LeetCode 39. Combination Sum\uff1f"},"content":{"rendered":"
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\u600e\u4e48\u4f18\u96c5\u5730\u4f7f\u7528 bottom up \u89e3\u51b3 LeetCode 39. Combination Sum\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span> <\/i> 4<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u9898\u76ee\uff1aCombination Sum – LeetCode<\/p>\n

    \n
  • top down: https:\/\/codeshare.io\/5MdEkJ<\/li>\n
  • bottom up: https:\/\/codeshare.io\/50kvxD<\/li>\n<\/ul>\n

    \u5f88\u660e\u663e\uff0cbottom up \u6bd4 top down \u590d\u6742\u591a\u4e86\uff0c\u4e5f\u66f4\u52a0\u96be\u4ee5\u7406\u89e3\uff0c\u8bf7\u95ee\u6709\u4ec0\u4e48\u4f18\u96c5\u7684\u65b9\u6cd5\u5b9e\u73b0 bottom up \u5417\uff1f<\/p>\n<\/p><\/div>\n

    \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (26<\/span>) <\/div>\n
    <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
      \n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      bottom up \u662f\u4ec0\u4e48\u601d\u8def\uff1f
      \u8fd9\u9898\u7b2c\u4e00\u611f\u89c9\u5c31\u662f BFS\/DFS \u548c DP \u4e24\u79cd\u505a\u6cd5\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : zxCoder <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      \u4ec0\u4e48\u53eb\u505a bottom up <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : zxCoder <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      \u8fd9\u4e0d\u5c31\u662f\u51d1\u786c\u5e01\u7684\u95ee\u9898\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : freakxx <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      @msg7086 #1
      @zxCoder #2 <\/p>\n

      \u4ed6\u5e94\u8be5\u662f\u60f3\u8bf4\u81ea\u5e95\u5411\u4e0a\uff0c
      \u7c7b\u4f3c\u52a8\u6001\u89c4\u5212\u5199\u6cd5\u3002<\/p>\n

      \u76f4\u63a5\u53c2\u8003\u8fd9\u4e2a\u5427\u3002
      https:\/\/leetcode-cn.com\/problems\/combination-sum\/solution\/chao-qiang-gifzhu-ni-shi-yong-dong-tai-gui-hua-qiu\/ <\/div>\n<\/p><\/div>\n<\/li>\n

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      \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      @msg7086 #1
      @zxCoder #2 <\/p>\n

      @freakxx #4 \u8bf4\u7684\u662f\u5bf9\u7684\uff0c\u6211\u8bf4\u7684\u662f\u52a8\u6001\u89c4\u5212\u4e2d\u7684\u81ea\u5e95\u5411\u4e0a\u3002<\/p>\n

      @freakxx #4 \u6211\u6700\u5f00\u59cb\u5c31\u662f\u5199\u51fa\u4e86\u7c7b\u4f3c https:\/\/leetcode-cn.com\/problems\/combination-sum\/solution\/chao-qiang-gifzhu-ni-shi-yong-dong-tai-gui-hua-qiu\/ \u4e2d\u7684\u7b97\u6cd5\uff0c\u4f46\u662f\u90a3\u4e2a\u7b97\u6cd5\u505a\u4e86\u4e00\u4e9b\u4e0d\u9700\u8981\u505a\u7684\u4e8b\u60c5\uff0c\u6bd4\u5982 candidates \u662f[1, 2]\uff0ctarget \u662f 3\uff0c\u90a3\u4e48\u7b97\u6cd5\u4f1a\u4ea7\u751f[[1, 1, 1], [1, 2], [2, 1]]\uff0c\u6ce8\u610f[1, 2]\u548c[2, 1]\u662f\u91cd\u590d\u7684\u3002\u5176\u5b9e\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u907f\u514d\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u8fd9\u4e5f\u662f https:\/\/codeshare.io\/5MdEkJ \u4e2d\u7b97\u6cd5\u6240\u80fd\u5b9e\u73b0\u7684\u3002<\/p>\n

      \u800c https:\/\/codeshare.io\/50kvxD \u662f https:\/\/codeshare.io\/5MdEkJ \u7684 bottom up \u7248\u672c\uff0c\u4f46\u662f\u5b9e\u73b0\u8d77\u6765\u592a\u590d\u6742\u4e86\uff0c\u6240\u4ee5\u60f3\u95ee\u95ee\u6709\u4ec0\u4e48\u4f18\u96c5\u7684\u65b9\u5f0f\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

    • \n
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      \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      @msg7086 #1 \u6211\u6709\u70b9\u597d\u5947\uff0c\u7528 BFS\/DFS \u600e\u4e48\u5b9e\u73b0\u5462\uff1f\u53ef\u4ee5\u5206\u4eab\u4e00\u4e0b\u4f60\u7684\u4ee3\u7801\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : zxCoder <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      @JasonLaw \u4efb\u4f55\u7b97\u6cd5\u90fd\u53ef\u4ee5\u901a\u8fc7 dfs \u679a\u4e3e\u89e3\u96c6\u6765\u505a\uff0cdp \u4e5f\u53ef\u4ee5\u5199\u6210\u8bb0\u5fc6\u5316\u641c\u7d22\u7684\u5f62\u5f0f\uff0c\u5c31\u662f\u4f60\u6240\u8bf4\u7684 top down? <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      @zxCoder #7 \u4f60\u6240\u8bf4\u7684 DFS \u662f\u4e0d\u662f\u5c31\u662f\u9012\u5f52\uff1f\u56e0\u4e3a\u9012\u5f52\u5176\u5b9e\u7c7b\u4f3c\u4e8e DFS\uff0c\u4f46\u662f\u6211\u611f\u89c9\u4f7f\u7528 DFS \u4e0d\u592a\u9002\u5408\uff0c\u6bd5\u7adf\u8ddf search \u6beb\u65e0\u5173\u7cfb\u3002\u8fd8\u662f\u8bf4\u6211\u6709\u54ea\u4e9b\u4e1c\u897f\u4e0d\u77e5\u9053\u7684\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : ericgui <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      https:\/\/www.bilibili.com\/video\/BV1854y1m7WR<\/p>\n

      \u8fd9\u4e2a\u89c6\u9891\u8bb2 39 \u9898 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

    • \n
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      \u8cc7\u6df1\u5927\u4f6c : ericgui <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      \u54e6\uff0c\u4f46\u8fd9\u4e2a\u89c6\u9891\u6ca1\u8bb2\u4f60\u8bf4\u7684 bottom up<\/p>\n

      \u6211\u4e5f\u6709\u7591\u95ee\uff1a\u4ec0\u4e48\u662f bottom up \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n

    • \n
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      \u8cc7\u6df1\u5927\u4f6c : beidounanxizi <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      \u4eb2 \u4f60\u597d \u4e48\u6709\u4f18\u96c5\u7684 bottom up
      \u53e6\u5916\uff0c \u9898\u76ee\u5237\u7684\u5c11 \u6240\u4ee5\u624d\u4f1a\u95ee\u8fd9\u79cd <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : user8341 <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      \u8fd9\u9053\u9898\u4f3c\u4e4e\u6ca1\u529e\u6cd5\u7528 DP \u505a\u3002\u5c31\u7b97\u4f60\u8bb0\u4e0b\u91cd\u590d\u7684\u5b50\u95ee\u9898\u7684\u89e3\uff0c\u4ecd\u7136\u8981\u904d\u5386\u590d\u5236\u89e3\u96c6\u4e2d\u7684\u6240\u6709\u5143\u7d20\u2014\u2014\u6ca1\u6709\u51cf\u5c11\u65f6\u95f4\u590d\u6742\u5ea6\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
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      \u8cc7\u6df1\u5927\u4f6c : ericgui <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      https:\/\/leetcode.wang\/leetCode-39-Combination-Sum.html<\/p>\n

      \u8fd9\u4e2a\u94fe\u63a5\uff0c\u8bb2\u4e86\u52a8\u6001\u89c4\u5212<\/p>\n

      \u4f46\u662f\u5427\uff0c\u6211\u548b\u611f\u89c9\u8fd9\u4ee3\u7801\u90a3\u4e48\u58a8\u8ff9\u5462 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

    • \n
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      \u8cc7\u6df1\u5927\u4f6c : nlzy <\/span> <\/div>\n
      <\/i> <\/span> <\/div>\n<\/p><\/div>\n
      https:\/\/gist.github.com\/Nlzy\/8e5f3773a37946f9f1434756c1d3ebad