{"id":203908,"date":"2025-05-22T08:21:09","date_gmt":"2025-05-22T00:21:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203908\/"},"modified":"2025-05-22T08:21:09","modified_gmt":"2025-05-22T00:21:09","slug":"leetcode-%e9%a1%b6%e7%ba%a7%e8%ae%bf%e8%b0%88-%e5%88%a0%e9%99%a4%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203908\/","title":{"rendered":"Leetcode \u2014 \u9876\u7ea7\u8bbf\u8c08 \u2014 \u5220\u9664\u5143\u7d20"},"content":{"rendered":"

<\/b> <\/p>\n

Leetcode \u2014 \u9876\u7ea7\u8bbf\u8c08 \u2014 \u5220\u9664\u5143\u7d20<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aLeetcode \u2014 \u9876\u7ea7\u8bbf\u8c08 \u2014 \u5220\u9664\u5143\u7d20\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u95ee\u9898\uff0c\u5305\u62ec\uff1a<\/p>\n

\n

\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums \u548c\u4e00\u4e2a\u6574\u6570 val\uff0c\u5c31\u5730\u5220\u9664 nums \u4e2d\u6240\u6709\u51fa\u73b0\u7684 val\u3002\u5143\u7d20\u7684\u987a\u5e8f\u53ef\u4ee5\u6539\u53d8\u3002\u7136\u540e\u8fd4\u56denums\u4e2d\u4e0d\u7b49\u4e8eval\u7684\u5143\u7d20\u4e2a\u6570\u3002
\u8003\u8651 nums \u4e2d\u4e0d\u7b49\u4e8e val \u7684\u5143\u7d20\u6570\u91cf\u4e3a k\uff0c\u8981\u88ab\u63a5\u53d7\uff0c\u60a8\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n

\u66f4\u6539\u6570\u7ec4 nums\uff0c\u4f7f nums \u7684\u524d k \u4e2a\u5143\u7d20\u5305\u542b\u4e0d\u7b49\u4e8e val \u7684\u5143\u7d20\u3002 nums \u7684\u5176\u4f59\u5143\u7d20\u4ee5\u53ca nums \u7684\u5927\u5c0f\u5e76\u4e0d\u91cd\u8981\u3002
\u8fd4\u56de k.<\/p>\n

\u81ea\u5b9a\u4e49\u6cd5\u5b98\uff1a<\/p>\n

\u6cd5\u5b98\u5c06\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6d4b\u8bd5\u60a8\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n

int[] nums = […]; \/\/ \u8f93\u5165\u6570\u7ec4
int val = …; \/\/ \u8981\u5220\u9664\u7684\u503c
int[] \u9884\u671f\u6570\u91cf = […]; \/\/ \u5177\u6709\u6b63\u786e\u957f\u5ea6\u7684\u9884\u671f\u7b54\u6848\u3002
\/\/ \u5b83\u5df2\u6392\u5e8f\uff0c\u6ca1\u6709\u503c\u7b49\u4e8e val\u3002
int k = removeelement(nums, val); \/\/ \u8c03\u7528\u60a8\u7684\u5b9e\u73b0
\u65ad\u8a00 k == expectednums.length;
\u6392\u5e8f\uff08\u6570\u5b57\uff0c0\uff0ck\uff09\uff1b \/\/ \u5bf9 nums
\u7684\u524d k \u4e2a\u5143\u7d20\u8fdb\u884c\u6392\u5e8f for (int i = 0; i < \u5b9e\u9645\u957f\u5ea6; i++) {
\u65ad\u8a00 nums[i] == expectednums[i];
}<\/p>\n

\u5982\u679c\u6240\u6709\u65ad\u8a00\u90fd\u901a\u8fc7\uff0c\u90a3\u4e48\u60a8\u7684\u89e3\u51b3\u65b9\u6848\u5c06\u88ab\u63a5\u53d7\u3002<\/p>\n

\u793a\u4f8b1\uff1a
\u8f93\u5165\uff1anums = [3,2,2,3], val = 3
\u8f93\u51fa\uff1a2\uff0cnums = [2,2,,<\/em>]
\u8bf4\u660e\uff1a\u60a8\u7684\u51fd\u6570\u5e94\u8fd4\u56de k = 2\uff0c\u4e14 nums \u7684\u524d\u4e24\u4e2a\u5143\u7d20\u4e3a 2\u3002
\u9664\u4e86\u8fd4\u56de\u7684 k \u4e4b\u5916\uff0c\u7559\u4e0b\u4ec0\u4e48\u5e76\u4e0d\u91cd\u8981\uff08\u56e0\u6b64\u5b83\u4eec\u662f\u4e0b\u5212\u7ebf\uff09\u3002<\/p>\n

\u793a\u4f8b2\uff1a
\u8f93\u5165\uff1anums = [0,1,2,2,3,0,4,2], val = 2
\u8f93\u51fa\uff1a5\uff0cnums = [0,1,4,0\u200b\u200b,3,,<\/em>,_]
\u8bf4\u660e\uff1a\u60a8\u7684\u51fd\u6570\u5e94\u8fd4\u56de k = 5\uff0c\u5176\u4e2d nums \u7684\u524d\u4e94\u4e2a\u5143\u7d20\u5305\u542b 0\u30010\u30011\u30013 \u548c 4\u3002
\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e94\u4e2a\u5143\u7d20\u53ef\u4ee5\u6309\u4efb\u610f\u987a\u5e8f\u8fd4\u56de\u3002
\u9664\u4e86\u8fd4\u56de\u7684 k \u4e4b\u5916\uff0c\u7559\u4e0b\u4ec0\u4e48\u5e76\u4e0d\u91cd\u8981\uff08\u56e0\u6b64\u5b83\u4eec\u662f\u4e0b\u5212\u7ebf\uff09\u3002<\/p>\n

\u9650\u5236\uff1a
0 <= nums.length <= 100
0 <= nums[i] <= 50
0 <= val <= 100<\/p>\n<\/blockquote>\n

\u5728\u8fd9\u4e2a\u95ee\u9898\u4e2d\uff0c\u4f60\u5fc5\u987b\u8fed\u4ee3\u6570\u7ec4\u5e76\u8bc6\u522b\u503c\uff0c\u5e76\u5c06\u5176\u4ece nums \u4e2d\u5220\u9664\u3002<\/p>\n

\u4e4d\u4e00\u770b\u4f60\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u53e6\u4e00\u4e2a\u6570\u7ec4\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u540e\u6765\u4f60\u5c06\u4e0d\u5f97\u4e0d\u8fdb\u884c\u53e6\u4e00\u6b21\u8fed\u4ee3\u6765\u8bbe\u7f6e\u503c\uff08\u76f4\u63a5\u8bbe\u7f6e\u662f\u884c\u4e0d\u901a\u7684\uff0c\u56e0\u4e3ajava\u4e0d\u4f1a\u66f4\u65b0\u65b9\u6cd5\u53d8\u91cf\u5f15\u7528\uff0c\u8fd9\u610f\u5473\u7740\u5728\u65b9\u6cd5\u5185\u90e8\u770b\u8d77\u6765\u50cf\u662f\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u4f46\u4e00\u65e6\u8d85\u51fa\u65b9\u6cd5\uff0c\u5b83\u5c31\u4f1a\u4fdd\u7559\u65e7\u7684\u5f15\u7528\uff09\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0d\u4f73\u3002<\/p>\n

\u7531\u4e8e\u9664\u4e86\u4e0d\u540c\u7684\u503c\u4e4b\u5916\uff0c\u6700\u7ec8\u7ed3\u679c\u4e0d\u4f9d\u8d56\u4e8e\u4efb\u4f55\u5176\u4ed6\u64cd\u4f5c\uff0c\u56e0\u6b64\u53ef\u4ee5\u7b80\u5355\u5730\u4fdd\u7559\u7d22\u5f15\u5e76\u66f4\u65b0\u503c\uff0c\u56e0\u4e3a\u60a8\u53d1\u73b0\u5b83\u4eec\u4e0e var \u4e0d\u540c\uff0c\u5e76\u4e14\u4e5f\u4f7f\u7528\u4e0e\u89e3\u51b3\u65b9\u6848\u76f8\u540c\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n

class Solution {\n    public int removeElement(int[] nums, int val) {\n        int diffIndex = 0;\n        for(int i=0;i<nums.length;i++) {\n            if(nums[i] != val)  {\n                nums[diffIndex] = nums[i];\n                diffIndex++;\n            }\n        }\n        return diffIndex;\n    }\n}\n<\/pre>\n
\n
\u8fd0\u884c\u65f6\u95f4\uff1a0 \u6beb\u79d2\uff0c\u6bd4 100.00% java \u5728\u7ebf\u63d0\u4ea4\u7684\u79fb\u9664\u5143\u7d20\u8981\u5feb\u3002
 \u5185\u5b58\u4f7f\u7528\u91cf\uff1a42 mb\uff0c\u4f4e\u4e8e java \u5728\u7ebf\u63d0\u4ea4\u7684\u79fb\u9664\u5143\u7d20\u7684 31.68%\u3002<\/p>\n<\/blockquote>\n
\u2014<\/p>\n
\u5c31\u662f\u8fd9\u6837\uff01\u5982\u679c\u8fd8\u6709\u4ec0\u4e48\u8981\u8ba8\u8bba\u7684\uff0c\u8bf7\u968f\u65f6\u53d1\u8868\u8bc4\u8bba\uff0c\u5982\u679c\u6211\u9519\u8fc7\u4e86\u4efb\u4f55\u5185\u5bb9\uff0c\u8bf7\u544a\u8bc9\u6211\uff0c\u4ee5\u4fbf\u6211\u8fdb\u884c\u76f8\u5e94\u66f4\u65b0\u3002<\/p>\n
\u76f4\u5230\u4e0b\u4e00\u7bc7\u6587\u7ae0\uff01 \ud83d\ude42<\/p>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aLeetcode \u2014 \u9876\u7ea7\u8bbf\u8c08 \u2014 \u5220\u9664\u5143\u7d20\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n
      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"
Leetcode \u2014 \u9876\u7ea7\u8bbf\u8c08 ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203908","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203908"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203908\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}