{"id":359,"date":"2020-09-26T10:30:52","date_gmt":"2020-09-26T02:30:52","guid":{"rendered":"http:\/\/39.96.58.60\/?p=359"},"modified":"2022-10-18T16:39:35","modified_gmt":"2022-10-18T08:39:35","slug":"leetcode-377-%e7%bb%84%e5%90%88%e6%80%bb%e5%92%8c-%e2%85%a3","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=359","title":{"rendered":"Leetcode 377. \u7ec4\u5408\u603b\u548c \u2163"},"content":{"rendered":"

\u7ed9\u5b9a\u4e00\u4e2a\u7531\u6b63\u6574\u6570\u7ec4\u6210\u4e14\u4e0d\u5b58\u5728\u91cd\u590d\u6570\u5b57\u7684\u6570\u7ec4\uff0c\u627e\u51fa\u548c\u4e3a\u7ed9\u5b9a\u76ee\u6807\u6b63\u6574\u6570\u7684\u7ec4\u5408\u7684\u4e2a\u6570\u3002<\/p>\n

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

nums<\/strong><\/em> = [1, 2, 3]\n\ntarget<\/strong><\/em> = 4\n\n\n\n\u6240\u6709\u53ef\u80fd\u7684\u7ec4\u5408\u4e3a\uff1a\n\n(1, 1, 1, 1)\n\n(1, 1, 2)\n\n(1, 2, 1)\n\n(1, 3)\n\n(2, 1, 1)\n\n(2, 2)\n\n(3, 1)\n\n\n\n\u8bf7\u6ce8\u610f\uff0c\u987a\u5e8f\u4e0d\u540c\u7684\u5e8f\u5217\u88ab\u89c6\u4f5c\u4e0d\u540c\u7684\u7ec4\u5408\u3002\n\n\n\n\u56e0\u6b64\u8f93\u51fa\u4e3a 7<\/strong>\u3002\n\n<\/pre>\n
\u8fdb\u9636\uff1a<\/strong><\/p>\n
\u5982\u679c\u7ed9\u5b9a\u7684\u6570\u7ec4\u4e2d\u542b\u6709\u8d1f\u6570\u4f1a\u600e\u4e48\u6837\uff1f<\/p>\n
\u95ee\u9898\u4f1a\u4ea7\u751f\u4ec0\u4e48\u53d8\u5316\uff1f<\/p>\n
\u6211\u4eec\u9700\u8981\u5728\u9898\u76ee\u4e2d\u6dfb\u52a0\u4ec0\u4e48\u9650\u5236\u6765\u5141\u8bb8\u8d1f\u6570\u7684\u51fa\u73b0\uff1f<\/p>\n
\u81f4\u8c22\uff1a<\/strong><\/p>\n
\u7279\u522b\u611f\u8c22 @pbrother<\/a> \u6dfb\u52a0\u6b64\u95ee\u9898\u5e76\u521b\u5efa\u6240\u6709\u6d4b\u8bd5\u7528\u4f8b\u3002<\/p>\n
**\u96be\u5ea6**: Medium<\/p>\n
**\u6807\u7b7e**: \u52a8\u6001\u89c4\u5212\u3001<\/p>\n
\n
\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a36 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8699.81% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.8 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8692.02% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u52a8\u6001\u89c4\u5212\n\n    \u4ee5 nums = [1,2,4] target = 7\u4e3a\u4f8b\n\n    target:     1       2       3       4       5       6       7\n    dp:         1       2       3       6       10      18      31\n\n        dp[i] = dp[i-1] + dp[i-2] + dp[i-4]\n\"\"\"\nclass Solution:\n    def combinationSum4(self, nums: List[int], target: int) -> int:\n        nums.sort()\n        dp = [0 for _ in range(target+1)]\n        dp[0] = 1\n\n        for t in range(1, target+1):\n\n            for num in nums:\n                if t  < num:\n                    break\n                else:\n                    dp[t] += dp[t-num]\n\n        return dp[target]<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u7ed9\u5b9a\u4e00\u4e2a\u7531\u6b63\u6574\u6570\u7ec4\u6210\u4e14\u4e0d\u5b58\u5728\u91cd\u590d\u6570\u5b57\u7684\u6570\u7ec4\uff0c\u627e\u51fa\u548c\u4e3a\u7ed9\u5b9a\u76ee\u6807\u6b63\u6574\u6570\u7684\u7ec4\u5408\u7684\u4e2a\u6570\u3002 \u793a\u4f8b: nums = [1,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/359"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=359"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/359\/revisions"}],"predecessor-version":[{"id":360,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/359\/revisions\/360"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=359"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}