{"id":77,"date":"2020-11-21T15:35:38","date_gmt":"2020-11-21T07:35:38","guid":{"rendered":"http:\/\/qqiuklele.cn\/?p=77"},"modified":"2025-03-26T15:13:59","modified_gmt":"2025-03-26T07:13:59","slug":"%e7%ae%97%e6%b3%95%e7%af%87%e4%ba%8c%e5%88%86%e6%b3%95%e7%9a%84%e8%ae%a4%e8%af%86%e5%92%8c%e8%bf%90%e7%94%a8","status":"publish","type":"post","link":"https:\/\/qqiukulele.cn\/?p=77","title":{"rendered":"\u7b97\u6cd5\u7bc7:\u4e8c\u5206\u6cd5\u7684\u8ba4\u8bc6\u548c\u8fd0\u7528"},"content":{"rendered":"\n

\u8ba4\u8bc6\u4e8c\u5206\u6cd5<\/h2>\n\n\n\n

\u901a\u4fd7\u5730\u89e3\u91ca\u4e8c\u5206\u6cd5\u662f\u4ec0\u4e48\uff0c\u90a3\u6211\u6700\u5148\u60f3\u5230\u7684\u662f\u731c\u6570\u5b57\u3002\u73a9\u5bb6\u901a\u8fc7\u4e0d\u65ad\u7f29\u5c0f\u5305\u542b\u76ee\u6807\u503c\u7684\u533a\u95f4\u8303\u56f4\uff0c\u76f4\u5230\u9009\u62e9\u5230\u53ea\u5269\u4e0b\u4e00\u4e2a\u503c\uff0c\u4e5f\u5c31\u662f\u8981\u627e\u5230\u7684\u6700\u7ec8\u76ee\u6807\u503c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4ec5\u5f53\u5217\u8868\u662f\u6709\u5e8f\u7684\u65f6\u5019\uff0c\u4e8c\u5206\u67e5\u627e\u624d\u662f\u7ba1\u7528\u7684<\/strong>\u3002<\/p>\n\n\n\n

\u8fd0\u884c\u65f6\u95f4<\/h2>\n\n\n\n

\u5047\u8bbe\u6211\u4eec\u5728\u4e00\u4e2a\u6709\u5e8f\u5217\u91cc\uff0c\u8fd0\u7528\u7b80\u5355\u67e5\u627e\u6328\u4e2a\u6328\u4e2a\u627e\uff0c\u90a3\u4e48\u9700\u8981\u731c\u6d4b\u7684\u6b21\u6570\u4e0e\u5217\u8868\u957f\u5ea6\u662f\u76f8\u540c\u7684\uff0c\u8fd9\u4e5f\u88ab\u79f0\u4e3a\u7ebf\u6027\u65f6\u95f4<\/em>\u3002<\/p>\n\n\n\n

\u4e8c\u5206\u67e5\u627e\uff0c\u5047\u8bbe\u4e00\u79cd\u597d\u7684\u60c5\u51b5\u2014\u2014\u6bcf\u6b21\u90fd\u53d6\u4e00\u534a\u533a\u95f4\u3002\u5982\u679c\u5bfb\u627e\u7684\u76ee\u6807\u503c\u6240\u5728\u5217\u8868\u5305\u542b100\u4e2a\u5143\u7d20\uff0c\u90a3\u6700\u591a\u731c7\u6b21\u3002\u5047\u8bbe\u4e3a40\u4ebf\u4e2a\u5143\u7d20\uff0c\u90a3\u6700\u591a\u53ea\u9700\u731c\u6d4b32\u6b21\uff01\u8fd9\u79cd\u60c5\u51b5\u88ab\u79f0\u4e3a\u5bf9\u6570\u65f6\u95f4<\/em>\u3002\u8981\u77e5\u9053\uff0c\u5bf9\u6570\u51fd\u6570\u7684y\u968f\u7740x\u7684\u589e\u5927\u800c\u589e\u5927\u7684\u901f\u7387\u662f\u8d8a\u6765\u8d8a\u5c0f\u7684\u3002\u6240\u4ee5\uff0c\u4e8c\u5206\u67e5\u627e\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u53ef\u4ee5\u8868\u793a\u4e3aO(logN)<\/strong>\u3002<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u4ee3\u7801\u5982\u4f55\u5b9e\u73b0\u4e8c\u5206\u6cd5<\/h2>\n\n\n\n

\u60f3\u8c61\u4e00\u4e0b\u73a9\u731c\u6570\u5b57\u7684\u8fc7\u7a0b\u5427\uff0c\u57281\u5230100\u731c\u6211\u6b64\u65f6\u6b64\u523b\u5185\u5fc3\u60f3\u7740\u7684\u6570\u5b57\u3002\u4f60\u8bf4\u7684X\u503c\u731c\u5927\u4e86\uff0c\u6211\u4f1a\u628a1\u5230100\u63d0\u793a\u52301\u5230X\uff1b\u5982\u679c\u4f60\u8bf4\u7684X\u503c\u731c\u5c0f\u4e86\uff0c\u6211\u4f1a\u63d0\u793a\u5230X\u5230100\u3002\u7ee7\u7eed…\u4f60\u7ec8\u4e8e\u731c\u5230\u4e86\uff0c\u8303\u56f4\u7f29\u51cf\u5230\u5c31\u4e00\u4e2a\u6570\uff0c\u5373\u4f60\u731c\u7684\u8fd9\u4e2a\u503c\u3002<\/p>\n\n\n\n

\u7528\u4ee3\u7801\u5b9e\u73b0\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u601d\u8003\u6211\u9700\u8981\u4ec0\u4e48\u53d8\u91cf\uff0c\u9700\u8981\u54ea\u4e9b\u6d41\u7a0b\u903b\u8f91\u4ee3\u7801\uff1a<\/p>\n\n\n\n

    \n
  1. left = 0\uff0cright = 100<\/li>\n\n\n\n
  2. \u4f60\u731c\u7684\u503c\u4e5f\u9700\u8981\u4e00\u4e2a\u53d8\u91cf\u4fdd\u5b58<\/li>\n\n\n\n
  3. \u6bd4\u8f83\uff0c\u7f29\u5c0f\u8303\u56f4\uff0c\u76f4\u5230\u4f60\u731c\u5230\u6211\u6240\u60f3<\/li>\n<\/ol>\n\n\n\n

    \u4f7f\u7528while\u5faa\u73af\u5b9e\u73b0<\/h3>\n\n\n\n

    arr\u662f\u731c\u6d4b\u7684\u6570\u7ec4\uff0cx\u662f\u8981\u5bfb\u627e\u7684\u503c\u3002<\/p>\n\n\n\n

    \/\/while\u5faa\u73af\u5199\u6cd5
    let whileFunction = function (arr, x) { 
      let start=0, \/\/\u6570\u7ec4\u7b2c\u4e00\u4e2a\u503c\u7684\u4e0b\u6807
          end=arr.length-1; \/\/\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u503c\u7684\u4e0b\u6807
      \/\/ \u53ea\u8981\u8303\u56f4\u6ca1\u6709\u7f29\u5c0f\u5230\u53ea\u5305\u542b\u4e00\u4e2a\u5143\u7d20
      while (start<=end){ 
       \/\/ \u540c\u65f6\u8981\u8003\u8651\u5185\u5b58\u6ea2\u51fa\u7684\u95ee\u9898
       let mid=Math.floor(start + (end - start)\/2); 
        if (arr[mid]===x) return true; 
       \/\/ \u5224\u65adx\u5728\u5de6\u8fb9\u8fd8\u662f\u53f3\u8fb9
       else if (arr[mid] < x) {
            start = mid + 1; 
        } else {
           end = mid - 1; 
       }
      } 
      return false; \/\/\u627e\u4e0d\u5230
    } <\/pre>\n\n\n\n
    \u4f7f\u7528\u9012\u5f52\u5b9e\u73b0<\/h3>\n\n\n\n
    \u53ef\u4ee5\u7528while\u5faa\u73af\u5b9e\u73b0\uff0c\u90a3\u5c31\u53ef\u4ee5\u8f6c\u6210\u9012\u5f52\u3002<\/p>\n\n\n\n
     let binarySearchFunction = function (arr, x, start, end) { 
     \/\/ \u4e5f\u5c31\u76f8\u5f53\u4e8e\u4e0d\u6ee1\u8db3while\uff08left<=right\uff09
         if (start > end) return false; 
        \/\/ \u540c\u65f6\u8981\u8003\u8651\u5185\u5b58\u6ea2\u51fa\u7684\u95ee\u9898
        let mid=Math.floor(start + (end - start)\/2); 
        \/\/ \u548c\u76ee\u6807\u503cx\u5bf9\u6bd4\uff0c\u4e00\u6b21\u547d\u4e2d
       if (arr[mid]===x) return true; 
       \/\/\u5982\u679c\u4f60\u731c\u7684\u4e2d\u95f4\u503c\u5927\u4e8e\u76ee\u6807\u503c
        if(arr[mid] > x) {
             return binarySearchFunction(arr, x, start, mid-1); 
        }\/\/end -> mid - 1;
        else {
             return binarySearchFunction(arr, x, mid+1, end); 
        }\/\/start -> mid + 1;
      } <\/pre>\n\n\n\n
    \u4f7f\u7528\u4e8c\u5206\u6cd5\u89e3\u51b3\u95ee\u9898<\/h2>\n\n\n\n
    \u4e0a\u9762\u7684\u4ee3\u7801\u7684\u6761\u4ef6\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u5faa\u73af\u5224\u65ad\u7684\u6761\u4ef6\u662fstart<= end\uff0c\u6216\u8005\u7ec8\u6b62\u6761\u4ef6\u662fstart>end\u3002\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p>\n\n\n\n
    \u56e0\u4e3a\u6211\u4eec\u4e8c\u5206\u7684\u65f6\u5019\uff0c\u8981\u8d70\u4e86\u5305\u542b\u76ee\u6807\u503c\u7684\u90a3\u4e00\u534a\u8fb9\u3002\u90a3\u6700\u540e\u6211\u4eec\u5f97\u5230\u76ee\u6807\u503c\uff0c\u4e5f\u5c31\u662f\u5f97\u5230\u53ea\u542b\u4e00\u4e2a\u76ee\u6807\u503c\u7684\u6570\u7ec4\uff0c\u6240\u4ee5\u662fstart=end=\u76ee\u6807\u503c\u5728\u6570\u7ec4\u7684\u4f4d\u7f6e\u4e0b\u6807<\/strong>\u3002<\/p>\n\n\n\n
    \u4f46\u662f\uff0c\u6709\u65f6\u5019\u6211\u4eec\u5df2\u7ecf\u5f97\u5230\u6700\u540e\u4e00\u4e2a\u53ea\u5305\u542b\u4e00\u4e2a\u5143\u7d20\u7684\u6570\u7ec4\u4e86\uff0c\u4f46\u662f\u4ed6\u4e0d\u7b49\u4e8e\u76ee\u6807\u503cX\uff01\uff01\u6ca1\u5173\u7cfb\uff0c\u5728start==end\u7684\u60c5\u51b5\u4e0b\uff0c\u7ee7\u7eed\u6267\u884cstart = mid + 1\uff0c\u6216\u8005end = mid – 1~\u90a3\u4e0b\u4e00\u6b21\u80af\u5b9a\u5c31\u9000\u51fa\u5faa\u73af\u4e86\u3002<\/p>\n\n\n\n
    \u4ee5\u4e0a\u90fd\u662f\u8bf4\u8981\u627e\u76ee\u6807\u503c\u7684\u95ee\u9898\uff0c\u90a3\u8981\u662f\u627e\u4e0d\u5230\uff0c\u6211\u60f3\u628a\u8fd9\u4e2a\u8981\u627e\u7684\u76ee\u6807\u503c\u63d2\u5165\u8fdb\u6570\u7ec4<\/strong>\u5462\uff1f\u8be5\u600e\u4e48\u89e3\u51b3\uff1f\u4e0a\u4e00\u9053\u9898\u770b\u770b\u3002<\/p>\n\n\n\n
    \u63a2\u7d22\u63d2\u5165\u4f4d\u7f6e<\/h4>\n\n\n\n
    \u9898\u76ee\u5bfc\u822a?\uff1a\u641c\u7d22\u63d2\u5165\u4f4d\u7f6e<\/a><\/p>\n\n\n\n
    \n
    \"\"<\/div><\/figure>\n<\/figure>\n\n\n\n
    \u5176\u5b9e\u6211\u60f3\u8bf4\uff0c\u6211\u4eec\u5728\u641c\u7d22\u4e4b\u524d\uff0c\u5e76\u4e0d\u77e5\u9053\u662f\u4e0d\u662f\u6709\u8fd9\u4e2a\u6570\u503c\uff0c\u6709\u5c31\u8fd4\u56de\u4e0b\u6807\u5457\u3002\u6ca1\u6709\u5c31\u6682\u4e14\u8fd4\u56denull\uff0c\u518d\u53bb\u6162\u6162\u601d\u8003\u5982\u4f55\u6b63\u786e\u8fd4\u56de\u8fd9\u4e2a\u6570\u503c\u5e94\u8be5\u63d2\u5165\u7684\u4f4d\u7f6e\u3002\uff08\u771f\u7684\uff0c\u5728\u6211\u770b\u6765\uff0c\u5b66\u4e60\u7b97\u6cd5\u771f\u7684\u662f\u4e00\u79cd\u9676\u51b6\u60c5\u64cd\u7684\u8fc7\u7a0b\uff0c\u4e0d\u8981\u6025\uff0c\u4e0d\u8981\u6c42\u505a\u9898\u6709\u591a\u5389\u5bb3\uff0c\u4e0d\u8981\u6c42\u6a21\u677f\u5957\u5f976\u4e0d6\uff09<\/p>\n\n\n\n
    \u601d\u8003\u5230\u7684\u70b9\u6709\u5982\u4e0b\uff1a<\/p>\n\n\n\n
      \n
    • \u8fd9\u9898\u662f\u8981\u8fd4\u56de\u6570\u7ec4\u4e0b\u6807\u7684\uff0c\u6240\u4ee5end\u548cstart\u7684\u53d6\u503c\u548c\u4e4b\u524d\u4e00\u6837\u662f\u6ca1\u6709\u6bdb\u75c5\u7684\uff01<\/li>\n\n\n\n
    • \u6bcf\u6b21\u7ed3\u675f\u987a\u6362\u7684\u60c5\u51b5\u662f\uff0cstart>end \u3002\u5728\uff08start=end=mid\uff09\u7684\u6700\u540e\u4e00\u6b21\u5faa\u73af\u91cc\uff0c\u8981\u4e0d\u5c31\u662f\u56e0\u4e3a\u6211\u4eec\u8981\u63d2\u5165\u7684\u6570\u7ec4\u5c0f\u4e8e\u6700\u7ec8\u5269\u4e0b\u7684\u90a3\u4e2a\u503c<\/strong>\u800cend=mid-1\uff0c\u6b64\u65f6\u8981\u63d2\u5165\u7684\u503c\u5e94\u63d2\u5165\u5230\u6700\u7ec8\u5269\u4e0b\u7684\u90a3\u4e2a\u503c\u5f97\u5de6\u8fb9\uff0c\u4e5f\u5c31\u662f\u8981\u66ff\u4ee3\u8fd9\u4e2a\u503c\u7684\u4f4d\u7f6e\uff08\u5750\u6807\u4e3aleft\u7684\u503c\uff09<\/strong>\uff0c\u540e\u9762\u7684\u5143\u7d20\u5168\u90e8\u5f80\u540e\u79fb\uff1b\u8981\u4e0d\u5c31\u662f\u5927\u4e8e\u6700\u7ec8\u5269\u4e0b\u7684\u90a3\u4e2a\u503c<\/strong>\u800cstart=mid+1\uff0c\u6b64\u65f6\u8981\u63d2\u5165\u7684\u503c\u5e94\u63d2\u5165\u5230\u6700\u7ec8\u5269\u4e0b\u7684\u90a3\u4e2a\u503c\u7684\u53f3\u8fb9\uff08\u4e5f\u5c31\u662f\u8981\u5728\u8fd9\u4e2a\u503c\u7684\u540e\u8fb9\u4f4d\u7f6e\uff08\u5750\u6807\u52a0\u4e00\u4e5f\u5c31\u662fmid+1\uff09<\/strong>\uff1b<\/li>\n<\/ul>\n\n\n\n
      \u53d1\u73b0\u6ca1\u6709\u53d1\u73b0\u6ca1\u6709\u53d1\u73b0\u6ca1\u6709\uff08\u6fc0\u52a8\u5730\u6413\u624b\u8df3\u8dc3~\uff09\uff01\u4ed6\u6700\u7ec8\u8981\u63d2\u5165\u7684\u4f4d\u7f6e\u4e0b\u6807\uff0c\u5c31\u7b49\u4e8e\u5faa\u73af\u7ed3\u675f\u540e\u7684left\u503c<\/strong>\uff01<\/p>\n\n\n\n
      \n
      \u6709\u4e00\u79cd\u60c5\u51b5\uff0c\u8981\u662f\u6570\u503c\u5c0f\u4e8e\u7b2c\u4e00\u4e2a\u6570\u6216\u8005\u5927\u4e8e\u6700\u540e\u4e00\u4e2a\u6570\u5462\uff1f\u90a3\u8fd9\u4e2a\u60f3\u6cd5\u8fd8\u7ba1\u7528\u5417\uff1f<\/p>\n\n\n\n
      \u6211\u60f3\u8bf4\uff0c\u7ba1\u7528\uff01\u53ef\u4ee5\u8bd5\u60f3\uff0c\u6211\u8981\u662f\u63d2\u5165\u6570\u503c\u6700\u540e\uff0c\u90a3\u6211\u662f\u4e0d\u662f\u610f\u5473\u7740\u5927\u4e8e\u539f\u5148\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u6570\u503c\uff0c\u90a3left = mid + 1\uff0c\u4e0d\u5c31\u662f\u539f\u5148\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u52a0\u4e00\u5417\uff1f<\/p>\n<\/blockquote>\n\n\n\n
      \u6240\u4ee5\u8fd9\u662f\u6211\u5bf9\u4e8e\u8fd9\u9053\u9898\u7684\u89e3\u6cd5\uff1a<\/p>\n\n\n\n
       \/**
       * @param {number[]} nums
       * @param {number} target
       * @return {number}
       *\/
      var searchInsert = function(nums, target) {
           let low = 0,
              high = nums.length - 1,
           
          while(low <= high) {  
              const mid =  parseInt((low+high)\/2);
              let guess = nums[mid];
              if (guess == target) {
                  return mid;
              } if (guess < target ) {
                  low = mid+1;
              } else {
                  high = mid-1;
              }
          }
          return low;  \/\/\u8fd9\u662f\u552f\u4e00\u7684\u53d8\u52a8\uff0c\u4e5f\u662f\u9898\u76ee\u6240\u8981\u6c42\u7684\u8fd4\u56de\u76ee\u6807\u503c\u8be5\u63d2\u5165\u7684\u4f4d\u7f6e\u4e0b\u6807
      };<\/pre>\n\n\n\n
      \u603b\u7ed3<\/h2>\n\n\n\n
      \u8fd9\u5c31\u662f\u4e8c\u5206\u6cd5\u3002\u6211\u4e5f\u662f\u8fb9\u5199\u8fb9\u603b\u7ed3\u7684\uff0c\u6240\u4ee5\u5199\u8d77\u6765\u80af\u5b9a\u4e5f\u6709\u4e0d\u8db3\u4e4b\u5904\u3002\u6709\u65f6\u5019\u505a\u4e8c\u5206\u9898\u51fa\u9519\uff0c\u6211\u4e5f\u662f\u5728\u7eb8\u4e0a\u4e00\u904d\u904d\u753b\u6211\u4ee3\u7801\u903b\u8f91\u7684\u8fd0\u884c\u8fc7\u7a0b\uff0c\u6162\u6162\u603b\u7ed3\u3002\u5982\u679c\u60a8\u6709\u66f4\u597d\u7684\u60f3\u6cd5\u6216\u8005\u53ef\u4ee5\u6307\u51fa\u6211\u7684\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u8054\u7cfb~<\/p>\n\n\n\n
      <\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5728\u6211\u770b\u6765\uff0c\u5b66\u4e60\u7b97\u6cd5\u771f\u7684\u662f\u4e00\u79cd\u9676\u51b6\u60c5\u64cd\u7684\u8fc7\u7a0b\uff0c\u4e0d\u8981\u6025\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-77","post","type-post","status-publish","format-standard","hentry","category-5"],"_links":{"self":[{"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/posts\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=77"}],"version-history":[{"count":4,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/posts\/77\/revisions"}],"predecessor-version":[{"id":482,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=\/wp\/v2\/posts\/77\/revisions\/482"}],"wp:attachment":[{"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qqiukulele.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}