{"id":156055,"date":"2020-09-12T23:35:31","date_gmt":"2020-09-12T15:35:31","guid":{"rendered":"http:\/\/4563.org\/?p=156055"},"modified":"2020-09-12T23:35:31","modified_gmt":"2020-09-12T15:35:31","slug":"%e5%b7%a8%e7%a1%ac%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e6%9c%80%e5%a4%a7%e5%ad%90%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=156055","title":{"rendered":"\u5de8\u786c\u9762\u8bd5\u9898\uff1a\u6700\u5927\u5b50\u6570\u7ec4"},"content":{"rendered":"
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\u5de8\u786c\u9762\u8bd5\u9898\uff1a\u6700\u5927\u5b50\u6570\u7ec4 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : zzzrf <\/span> <\/i> 1<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\uff0c\u627e\u5230\u4e00\u4e2a\u5177\u6709\u6700\u5927\u548c\u7684\u5b50\u6570\u7ec4\uff0c\u8fd4\u56de\u5176\u6700\u5927\u548c\u3002<\/p>\n

\u6837\u4f8b 1:<\/h2>\n
\u8f93\u5165\uff1a[\u22122,2,\u22123,4,\u22121,2,1,\u22125,3] \u8f93\u51fa\uff1a6 \u89e3\u91ca\uff1a\u7b26\u5408\u8981\u6c42\u7684\u5b50\u6570\u7ec4\u4e3a[4,\u22121,2,1]\uff0c\u5176\u6700\u5927\u548c\u4e3a 6 \u3002 <\/code><\/pre>\n
\u6837\u4f8b 2:<\/h2>\n
\u8f93\u5165\uff1a[1,2,3,4] \u8f93\u51fa\uff1a10 \u89e3\u91ca\uff1a\u7b26\u5408\u8981\u6c42\u7684\u5b50\u6570\u7ec4\u4e3a[1,2,3,4]\uff0c\u5176\u6700\u5927\u548c\u4e3a 10 \u3002 <\/code><\/pre>\n
\u5728\u7ebf\u505a\u9898\u5730\u5740<\/p>\n
\u7b97\u6cd5<\/h2>\n
\u8d2a\u5fc3<\/p>\n
\u7b97\u6cd5\u5206\u6790<\/h2>\n
    \n
  • \u9898\u76ee\u8981\u6c42\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\uff0c\u627e\u5230\u4e00\u4e2a\u5177\u6709\u6700\u5927\u548c\u7684\u5b50\u6570\u7ec4\uff0c\u8fd4\u56de\u5176\u6700\u5927\u548c\u3002\u82e5\u76f4\u63a5\u66b4\u529b\u679a\u4e3e\u5b50\u6570\u7ec4\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u9700\u8981 O(N2)\uff1b<\/li>\n
  • \u7531\u4e8e\u9898\u76ee\u8981\u6c42\u662f\u5b50\u6570\u7ec4\u6700\u5927\u548c\uff0c\u56e0\u6b64\u53ef\u4ee5\u5229\u7528\u8d2a\u5fc3\u601d\u60f3\uff0c\u901a\u8fc7\u5c40\u90e8\u7684\u5b50\u6570\u7ec4\u6700\u5927\uff0c\u8fdb\u800c\u5f97\u5230\u6574\u4f53\u7684\u6700\u4f18\u89e3\uff1b<\/li>\n
  • \u9700\u8981\u6ce8\u610f\u8d2a\u5fc3\u7684\u7b56\u7565\u4e0d\u80fd\u6709\u540e\u6548\u6027\uff1b<\/li>\n<\/ul>\n
    \u7b97\u6cd5\u6b65\u9aa4<\/h2>\n
      \n
    1. \u5b9a\u4e49 maxAns \u8bb0\u5f55\u5168\u5c40\u6700\u5927\u503c\uff0c\u5373\u7ed3\u679c\uff1b sum \u8bb0\u5f55\u5f53\u524d\u5b50\u6570\u7ec4\u7684\u548c\uff1b<\/li>\n
    2. \u521d\u59cb\u5316\uff1amaxAns=Integer.MIN_VALUE; sum=0; \u56e0\u4e3a\u6570\u7ec4\u53ef\u4ee5\u5168\u4e3a\u8d1f\u6570\uff0c\u56e0\u6b64 maxAns \u4e0d\u80fd\u76f4\u63a5\u521d\u59cb\u5316\u4e3a 0 \uff1b<\/li>\n
    3. \u904d\u5386\u6574\u6570\u6570\u7ec4\uff1a<\/li>\n<\/ol>\n
        \n
      • Sum \u7d2f\u52a0\u5f53\u524d\u7684\u503c\uff1b<\/li>\n
      • \u82e5\u5f53\u524d sum>maxAns\uff0c\u66f4\u65b0 maxAns=sum \uff1b<\/li>\n
      • \u82e5\u5f53\u524d sum<0\uff0c\u8868\u793a\u5f53\u524d\u7684\u5b50\u6570\u7ec4\u548c\u5df2\u7ecf\u4e3a\u8d1f\uff0c\u7d2f\u52a0\u5230\u540e\u9762\u4f1a\u4f7f\u548c\u66f4\u5c0f\uff0c\u56e0\u6b64\u4ee4 sum=0\uff0c\u76f8\u5f53\u4e8e\u653e\u5f03\u5f53\u524d\u7684\u5b50\u6570\u7ec4\uff0c\u91cd\u65b0\u5f00\u59cb\uff1b<\/li>\n<\/ul>\n
        \u590d\u6742\u5ea6<\/h2>\n
          \n
        • \u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(N),N \u4e3a\u6570\u7ec4\u957f\u5ea6\n
            \n
          • \u53ea\u9700\u8981\u904d\u5386\u4e00\u904d\u6570\u7ec4\u5c31\u80fd\u627e\u5230\u7b54\u6848\uff1b<\/li>\n<\/ul>\n<\/li>\n
          • \u7a7a\u95f4\u590d\u6742\u5ea6\uff1aO(1)\n
              \n
            • \u53ea\u9700\u8981\u7528\u5230 maxAns \u548c sum \u4e24\u4e2a\u53d8\u91cf.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
              public class Solution {     \/**      * @param nums: A list of integers      * @return: A integer indicate the sum of max subarray      *\/     public int maxSubArray(int[] nums) {          \/\/ maxAns \u8bb0\u5f55\u5168\u5c40\u6700\u5927\u503c sum \u8bb0\u5f55\u5f53\u524d\u5b50\u6570\u7ec4\u7684\u548c         int maxAns = Integer.MIN_VALUE, sum = 0;         \/\/ \u8d2a\u5fc3         for (int i = 0; i < nums.length; i++) {             sum += nums[i];             maxAns = Math.max(maxAns, sum);             sum = Math.max(sum, 0);         }          return maxAns;     } } <\/code><\/pre>\n<\/p><\/div>\n
               \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (19<\/span>)        <\/div>\n
               <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
                \n
              • \n
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                 \u8cc7\u6df1\u5927\u4f6c : xhxhx <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u52a8\u6001\u89c4\u5212                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : Dabaicong <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             [\u22122,2,\u22123,4,\u22121,2,1,\u22125,3] \u6700\u5927\u503c\u4e0d\u5e94\u8be5\u662f 12 \u4e48\uff0c\u5b50\u6570\u7ec4\u662f[2,4,2,1,3] ,                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : gromit1337 <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             @Dabaicong #2 \u4ed6\u6ca1\u8bf4\u6e05\u695a\u5b50\u6570\u7ec4\u8981\u8fde\u7740                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : tikazyq <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u7528 HashMap \u4e0d\u884c\u4e48\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : YueZhang <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             https:\/\/juejin.im\/post\/6844903935371804679<\/p>\n
                \u6211\u5199\u7684\u89e3\u6790\uff0c\u5927\u5bb6\u53ef\u4ee5\u652f\u6301\u4e0b\u3002\u770b\u4e0d\u660e\u767d\uff0c\u4f60\u627e\u6211                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : Dabaicong <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u5dee\u70b9\u770b\u7684\u81ea\u5df1\u6000\u7591\u667a\u5546\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : Dabaicong <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             @gromit1337 \u4e86\u89e3\u4e86\u3002\u90a3 dp \u5c31\u662f\u6807\u51c6\u89e3\u6cd5\uff0c\u65f6\u95f4 O(N)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : 8Cangtou <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             func maxSubArray(nums []int) int {
                 if len(nums) == 1{
                 return nums[0]
                 }
                 dp := make([]int, len(nums))
                 dp[0] = nums[0]
                 res := nums[0]
                 for i := 1;i < len(nums); i++{
                 dp[i] = max(dp[i-1] + nums[i], nums[i])
                 res = max(res, dp[i])
                 }
                 return res
                }<\/p>\n
                func max(a, b int) int{
                 if a > b{
                 return a
                 }
                 return b
                }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : amaranthf <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u8fd9\u4e2a\u8d2a\u5fc3\u7684\u89e3\u91ca\u65e0\u6cd5\u7406\u89e3\u2026\u2026\u4f3c\u4e4e\u662f dp \u7684\u4e00\u79cd\u7b80\u5316\u5f62\u5f0f\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : ericgui <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             @Dabaicong \u4f60\u80af\u5b9a\u6392\u5e8f\u4e86\uff0c\u54c8\u54c8\uff0c\u6211\u4e5f\u9047\u5230\u8fc7\u8fd9\u4e2a\u95ee\u9898                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : Goldilocks <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u8fd9\u4e0d\u662f\u7b97\u6cd5\u5bfc\u8bba\u8bfe\u672c\u7684\u6b63\u6587\u4f8b\u5b50\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : usingnamespace <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u8fd9\u7279\u4e48\u662f\u6700\u6700\u6700\u6700\u6700\u7b80\u5355\u7684 dp \u4e86\u5427….\u5f00\u59cb\u8fd8\u4ee5\u4e3a\u662f\u5b50\u5e8f\u5217\u7684\uff0c\u8fd8\u7a0d\u5fae\u9ebb\u70e6\u70b9\uff0c\u5b50\u6570\u7ec4\u8fd9\u79cd\u771f\u662f\u592a\u5165\u95e8\u7ea7\u522b\u7b80\u5355\u4e86\uff0c\u7528\u4e24\u4e2a\u53d8\u91cf\u4e5f\u662f\u5f88\u7b80\u5355\u7684\u4e00\u7ef4 dp \u4f18\u5316                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : mahaonan1994 <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             @Livid                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : gygy19941221 <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u8fd9\u53eb\u52a8\u6001\u89c4\u5212\u4e0d\u53eb\u8d2a\u5fc3……
                dp[i]\u8868\u793a\u4ee5\u4f4d\u7f6e i \u4e3a\u7ed3\u5c3e\u7684\u5b50\u6570\u7ec4\u548c\u6700\u5927\u503c\uff0c\u5982\u679c dp[i-1]\u5c0f\u4e8e 0\uff0c\u5219 dp[i] = arr[i]\u3002\u5982\u679c dp[i-1]\u5927\u4e8e 0\uff0c\u5219 dp[i]=dp[i-1]+arr[i]\u3002\u8fd9\u662f\u72b6\u6001\u8f6c\u79fb\u65b9\u7a0b\u3002
                \u7136\u540e\u89c2\u5bdf\u53d1\u73b0\u8ba1\u7b97 dp[i]\u53ea\u9700\u8981 dp[i-1]\u8fd9\u4e2a\u72b6\u6001\uff0c\u56e0\u6b64\u53ef\u4ee5\u53ea\u7528\u4e00\u4e2a\u53d8\u91cf\u53cd\u590d\u66f4\u65b0\u65b0\u7684 dp[i-1]\u7684\u503c\uff0c\u4e0d\u9700\u8981\u7528 dp \u6570\u7ec4\u5b58\u50a8\u4e4b\u524d\u7684\u6bcf\u4e00\u4e2a\u72b6\u6001\uff0c\u80fd\u964d\u4f4e\u7a7a\u95f4\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : est <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u5fd8\u8bb0\u8d34\u516c\u4f17\u53f7 \u63a8\u5e7f\u4e8c\u7ef4\u7801\u4e86\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
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                 \u8cc7\u6df1\u5927\u4f6c : ccagml <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u54ea\u91cc\u53ef\u4ee5\u77e5\u9053\u4e3b\u7684\u63a8\u5e7f\u4e8c\u7ef4\u7801\u5462                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : Livid <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             @zzzrf \u4e0b\u6b21\u8bf7\u628a\u8fd9\u6837\u7684\u4e3b\u9898\u53d1\u5230 \/go\/promotions<\/p>\n
                \u8fd9\u6b21\u6211\u4eec\u5df2\u7ecf\u4e3a\u4f60\u79fb\u52a8\u3002<\/p>\n
                \u8bf7\u9605\u8bfb V2EX \u7684\u8282\u70b9\u4f7f\u7528\u8bf4\u660e\uff1a<\/p>\n
                https:\/\/www.v2ex.com\/help\/node                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : nvioue <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             1 \u5206\u4e0d\u6e05\u8d2a\u5fc3\u548c dp
                2 \u4e0d\u89e3\u91ca \u201c\u5b50\u6570\u7ec4\u201d \u7684\u5177\u4f53\u5b9a\u4e49\uff0c \u8fde\u7eed\u8fd8\u662f\u4e0d\u8fde\u7eed\uff1f
                3 \u5e26\u4e0a\u5de8\u786c\u5e72\u4ec0\u4e48 \uff1f flaamg \u4e00\u822c\u4e0d\u8003\u539f\u9898\u7684\u5427<\/p>\n
                https:\/\/leetcode.com\/problems\/maximum-subarray\/                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
              • \n
                \n
                \n
                 \u8cc7\u6df1\u5927\u4f6c : liukangxu <\/span>  <\/div>\n
                 <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                             \u4e3a\u5565\u6bcf\u6b21\u90fd\u8981\u78b0\u74f7\u5de8\u786c\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
              • \n","protected":false},"excerpt":{"rendered":"
                \u5de8\u786c\u9762\u8bd5\u9898\uff1a\u6700\u5927\u5b50\u6570\u7ec4 \u8cc7\u6df1\u5927\u4f6c …<\/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\/156055"}],"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=156055"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/156055\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=156055"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=156055"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=156055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}