{"id":153892,"date":"2020-09-10T14:53:43","date_gmt":"2020-09-10T06:53:43","guid":{"rendered":"http:\/\/4563.org\/?p=153892"},"modified":"2020-09-10T14:53:43","modified_gmt":"2020-09-10T06:53:43","slug":"google-%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e5%9c%a8%e6%8e%92%e5%ba%8f%e6%95%b0%e7%bb%84%e4%b8%ad%e6%89%be%e6%9c%80%e6%8e%a5%e8%bf%91%e7%9a%84-k-%e4%b8%aa%e6%95%b0","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=153892","title":{"rendered":"Google \u9762\u8bd5\u9898\uff1a\u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u627e\u6700\u63a5\u8fd1\u7684 K \u4e2a\u6570"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  Google \u9762\u8bd5\u9898\uff1a\u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u627e\u6700\u63a5\u8fd1\u7684 K \u4e2a\u6570               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : zzzrf <\/span>  <span><i><\/i> 1<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u7ed9\u4e00\u4e2a\u76ee\u6807\u6570 target, \u4e00\u4e2a\u975e\u8d1f\u6574\u6570 k, \u4e00\u4e2a\u6309\u7167\u5347\u5e8f\u6392\u5217\u7684\u6570\u7ec4 A \u3002\u5728 A \u4e2d\u627e\u4e0e target \u6700\u63a5\u8fd1\u7684 k \u4e2a\u6574\u6570\u3002\u8fd4\u56de\u8fd9 k \u4e2a\u6570\u5e76\u6309\u7167\u4e0e target \u7684\u63a5\u8fd1\u7a0b\u5ea6\u4ece\u5c0f\u5230\u5927\u6392\u5e8f\uff0c\u5982\u679c\u63a5\u8fd1\u7a0b\u5ea6\u76f8\u5f53\uff0c\u90a3\u4e48\u5c0f\u7684\u6570\u6392\u5728\u524d\u9762\u3002<\/p>\n<ol>\n<li>k \u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\uff0c\u5e76\u4e14\u603b\u662f\u5c0f\u4e8e\u5df2\u6392\u5e8f\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<li>\u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u6b63\u6574\u6570, \u4e0d\u4f1a\u8d85\u8fc7 10^4<\/li>\n<li>\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u7edd\u5bf9\u503c\u4e0d\u4f1a\u8d85\u8fc7 10^4<\/li>\n<\/ol>\n<p>\u70b9\u6b64\u5728\u7ebf\u505a\u9898<\/p>\n<h2>\u6837\u4f8b 1:<\/h2>\n<pre><code>\u8f93\u5165: A = [1, 2, 3], target = 2, k = 3 \u8f93\u51fa: [2, 1, 3] <\/code><\/pre>\n<h2>\u6837\u4f8b 2:<\/h2>\n<pre><code>\u8f93\u5165: A = [1, 4, 6, 8], target = 3, k = 3 \u8f93\u51fa: [4, 1, 6] <\/code><\/pre>\n<h2>[\u9898\u89e3]<\/h2>\n<p>\u76f4\u63a5\u5728\u6570\u7ec4\u4e2d\u4e8c\u5206\u67e5\u627e target, \u5982\u679c\u4e0d\u5b58\u5728\u5219\u8fd4\u56de\u5927\u4e8e target \u7684\u6700\u5c0f\u7684\u6216\u8005\u5c0f\u4e8e target \u7684\u6700\u5927\u7684\u5143\u7d20\u5747\u53ef. \u7136\u540e\u4f7f\u7528\u4e24\u6839\u6307\u9488\u4ece\u8be5\u4f4d\u7f6e\u5f00\u59cb\u5411\u4e24\u7aef\u904d\u5386, \u6bcf\u6b21\u628a\u5dee\u503c\u6bd4\u8f83\u5c0f\u7684\u5143\u7d20\u653e\u5165\u7b54\u6848\u4e2d\u7136\u540e\u5c06\u8be5\u6307\u9488\u5411\u8fb9\u754c\u65b9\u5411\u79fb\u52a8\u4e00\u4e0b\u5373\u53ef.<\/p>\n<pre><code>public class Solution {     \/**      * @param A      an integer array      * @param target an integer      * @param k      a non-negative integer      * @return an integer array      *\/     public int[] kClosestNumbers(int[] A, int target, int k) {         int[] result = new int[k];          if (A == null || A.length == 0) {             return A;         }         if (k &gt; A.length) {             return A;         }          int index = firstIndex(A, target);          int start = index - 1;         int end = index;         for (int i = 0; i &lt; k; i++) {             if (start &lt; 0) {                 result[i] = A[end++];             } else if (end &gt;= A.length) {                 result[i] = A[start--];             } else {                 if (target - A[start] &lt;= A[end] - target) {                     result[i] = A[start--];                 } else {                     result[i] = A[end++];                 }             }         }         return result;     }      private int firstIndex(int[] A, int target) {         int start = 0, end = A.length - 1;         while (start + 1 &lt; end) {             int mid = start + (end - start) \/ 2;             if (A[mid] &lt; target) {                 start = mid;             } else if (A[mid] &gt; target) {                 end = mid;             } else {                 end = mid;             }         }          if (A[start] &gt;= target) {             return start;         }         if (A[end] &gt;= target) {             return end;         }         return A.length;     } } <\/code><\/pre>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>12<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"3229615\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : zoyua <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u9898\u611f\u89c9\u7528\u5806\u6bd4\u8f83\u597d\uff0c\u8282\u70b9\u7684\u503c\u662f\u5143\u7d20\u4e0e target \u7684\u5dee\u503c\uff0c\u7ef4\u62a4\u4e00\u4e2a k \u5927\u5c0f\u7684\u5c0f\u6839\u5806\uff0c\u6700\u540e\u4f9d\u6b21\u5f39\u51fa\u5806\u9876                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229616\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : zzzrf <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @zoyua \u5b66\u4e60\u4e86~                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229617\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : widewing <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             k \u5f88\u5927\u7684\u60c5\u51b5\u4e0b\u662f\u4e0d\u662f\u6709\u66f4\u9ad8\u6548\u7684\u505a\u6cd5                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229618\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : xiadong1994 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @zoyua \u65f6\u95f4\u590d\u6742\u5ea6\u592a\u9ad8                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229619\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : zzzrf <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @widewing \u6211\u76ee\u524d\u53ea\u60f3\u5230\u4e86\u8fd9\u79cd\u89e3\u6cd5\uff0c\u7b49\u4e2a\u5927\u4f6c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229620\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : widewing <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u627e\u5230 target,\u7136\u540e\u5de6\u53f3 \u53d6 k\/2\uff0c\u6bd4\u8f83\u5927\u5c0f\uff0c\u7136\u540e\u518d k\/2 +\/- k\/4\uff0c\u8fd9\u6837\u4e8c\u5206\u4e0b\u53bb\uff0c\u65f6\u95f4\u590d\u6742\u5ea6 log(k)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229621\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : XiaoxiaoPu <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @zoyua \u8fd9\u9053\u9898\u6709\u4e2a\u4fe1\u606f\u300c\u6570\u7ec4 A \u300d\u662f\u5347\u5e8f\u6392\u5217\u7684\uff0c\u7528\u5806\u7684\u8bdd\u65e0\u6cd5\u5229\u7528\u8fd9\u4e00\u70b9\uff0c\u5e94\u8be5\u4e0d\u662f\u6700\u4f73\u65b9\u6848\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229622\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : binux <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @widewing K \u4e2a\u6570\u6700\u7ec8\u662f\u8981\u88ab\u8f93\u51fa\u7684\uff0c\u6700\u5c0f\u4e5f\u662f O(k)\uff0c\u4f60\u8fd9\u6837\u627e\u8fb9\u754c\u6ca1\u6709\u610f\u4e49\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229623\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : widewing <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @binux \u6570\u7ec4\u662f\u6392\u5e8f\u7684\u554a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229624\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : georgetso <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @zoyua \u9898\u4e3b\u590d\u6742\u5ea6 log(N) + k; \u5efa\u5806\u590d\u6742\u5ea6\u8d85\u4e86.                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229625\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : binux <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @widewing \u4f46\u662f\u4f60\u8981\u8f93\u51fa K \u4e2a\u6570\u7684\u554a\uff0c\u4f60\u4e0d\u8bbf\u95ee k \u6b21\u600e\u4e48\u8f93\u51fa\u5b83\u5462\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3229626\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : widewing <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @binux \u597d\u5427\uff0c\u4f46\u81f3\u5c11\u8282\u7701\u4e86 k \u4e2a\u6bd4\u8f83                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>Google \u9762\u8bd5\u9898\uff1a\u5728\u6392\u5e8f\u6570\u7ec4\u4e2d&hellip;<\/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\/153892"}],"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=153892"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/153892\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=153892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=153892"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=153892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}