{"id":104,"date":"2025-08-21T17:44:52","date_gmt":"2025-08-21T09:44:52","guid":{"rendered":"https:\/\/heyingnian.com\/?p=104"},"modified":"2025-08-22T16:46:13","modified_gmt":"2025-08-22T08:46:13","slug":"leetcode-1","status":"publish","type":"post","link":"https:\/\/heyingnian.com\/index.php\/2025\/08\/21\/leetcode-1\/","title":{"rendered":"\u4e24\u6570\u4e4b\u548c"},"content":{"rendered":"\n
\n

\ud83d\udd17 \u4e24\u6570\u4e4b\u548c<\/h1>\n\n\n\n
\n

\u9898\u76ee\u6765\u6e90\uff1a1. \u4e24\u6570\u4e4b\u548c – \u529b\u6263\uff08LeetCode\uff09<\/a><\/a><\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

\ud83d\udccc \u9898\u76ee\u63cf\u8ff0<\/h3>\n\n\n\n

\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums<\/code> \u548c\u4e00\u4e2a\u6574\u6570\u76ee\u6807\u503c target<\/code>\uff0c\u8bf7\u4f60\u5728\u8be5\u6570\u7ec4\u4e2d\u627e\u51fa \u548c\u4e3a\u76ee\u6807\u503c target<\/code><\/strong> \u7684\u90a3 \u4e24\u4e2a\u6574\u6570<\/strong>\uff0c\u5e76\u8fd4\u56de\u5b83\u4eec\u7684\u6570\u7ec4\u4e0b\u6807\u3002<\/p>\n\n\n\n

\u4f60\u53ef\u4ee5\u5047\u8bbe\u6bcf\u79cd\u8f93\u5165\u53ea\u4f1a\u5bf9\u5e94\u4e00\u4e2a\u7b54\u6848\uff0c\u5e76\u4e14\u4f60\u4e0d\u80fd\u4f7f\u7528\u4e24\u6b21\u76f8\u540c\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n

\u4f60\u53ef\u4ee5\u6309\u4efb\u610f\u987a\u5e8f\u8fd4\u56de\u7b54\u6848\u3002<\/p>\n\n\n\n

\n\n\n\n

\u2705 \u793a\u4f8b\u89e3\u6790<\/h3>\n\n\n\n

\u793a\u4f8b 1\uff1a<\/strong><\/h4>\n\n\n\n
    \n
  • \u8f93\u5165<\/strong>\uff1anums = [2,7,11,15]<\/code>,\u00a0target = 9<\/code><\/li>\n\n\n\n
  • \u8f93\u51fa<\/strong>\uff1a[0,1]<\/code><\/li>\n\n\n\n
  • \u89e3\u91ca<\/strong>\uff1a\u56e0\u4e3a\u00a0nums[0] + nums[1] == 9<\/code>\uff0c\u8fd4\u56de\u00a0[0, 1]<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n

    \u793a\u4f8b 2\uff1a<\/strong><\/h4>\n\n\n\n
      \n
    • \u8f93\u5165<\/strong>\uff1anums = [3,2,4]<\/code>,\u00a0target = 6<\/code><\/li>\n\n\n\n
    • \u8f93\u51fa<\/strong>\uff1a[1,2]<\/code><\/li>\n<\/ul>\n\n\n\n

      \u793a\u4f8b 3\uff1a<\/strong><\/h4>\n\n\n\n
        \n
      • \u8f93\u5165<\/strong>\uff1anums = [3,3]<\/code>,\u00a0target = 6<\/code><\/li>\n\n\n\n
      • \u8f93\u51fa<\/strong>\uff1a[0,1]<\/code><\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        \u26a0\ufe0f \u63d0\u793a<\/h3>\n\n\n\n
          \n
        • 2 <= nums.length <= 10\u2074<\/code><\/li>\n\n\n\n
        • -10\u2079 <= nums[i] <= 10\u2079<\/code><\/li>\n\n\n\n
        • -10\u2079 <= target <= 10\u2079<\/code><\/li>\n\n\n\n
        • \u53ea\u4f1a\u5b58\u5728\u4e00\u4e2a\u6709\u6548\u7b54\u6848<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          \ud83d\udca1 \u89e3\u6cd5\uff1a\u54c8\u5e0c\u8868<\/h3>\n\n\n\n
          class<\/strong> Solution<\/strong> {
              public<\/strong> int<\/strong>[] twoSum(int<\/strong>[] nums, int<\/strong> target) {
                  Map<Integer, Integer> map = new<\/strong> HashMap<>();
                  for<\/strong> (int<\/strong> i = 0; i < nums.length; i++) {
                      int<\/strong> complement = target - nums[i];
                      if<\/strong> (map.containsKey(complement)) {
                          return<\/strong> new<\/strong> int<\/strong>[] { map.get(complement), i };
                      }
                      map.put(nums[i], i);
                  }
                  return<\/strong> new<\/strong> int<\/strong>[0]; 
              }
          }<\/code><\/pre>\n\n\n\n
          \n\n\n\n
          \ud83d\udcca \u590d\u6742\u5ea6\u5206\u6790<\/h3>\n\n\n\n
            \n
          • \u65f6\u95f4\u590d\u6742\u5ea6<\/strong>\uff1aO(n) \u2014\u2014 \u4e00\u6b21\u904d\u5386<\/li>\n\n\n\n
          • \u7a7a\u95f4\u590d\u6742\u5ea6<\/strong>\uff1aO(n) \u2014\u2014 \u54c8\u5e0c\u8868\u5b58\u50a8\u6700\u591a n \u4e2a\u5143\u7d20<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            \ud83e\udde9 \u89e3\u9898\u601d\u8def\u7b80\u8ff0<\/h3>\n\n\n\n
            \u904d\u5386\u6570\u7ec4\uff0c\u5bf9\u6bcf\u4e2a\u5143\u7d20 nums[i]<\/code>\uff0c\u8ba1\u7b97\u5176\u201c\u8865\u6570\u201d target - nums[i]<\/code>\uff0c\u68c0\u67e5\u662f\u5426\u5df2\u5728\u54c8\u5e0c\u8868\u4e2d\uff1a<\/p>\n\n\n\n
              \n
            • \u82e5\u5b58\u5728 \u2192 \u627e\u5230\u7b54\u6848\uff0c\u8fd4\u56de\u4e0b\u6807<\/li>\n\n\n\n
            • \u82e5\u4e0d\u5b58\u5728 \u2192 \u5c06\u00a0nums[i]<\/code>\u00a0\u548c\u5176\u4e0b\u6807\u5b58\u5165\u54c8\u5e0c\u8868<\/li>\n<\/ul>\n\n\n\n
              \u5229\u7528\u54c8\u5e0c\u8868\u5b9e\u73b0 O(1) \u67e5\u627e\uff0c\u5c06\u66b4\u529b O(n\u00b2) \u4f18\u5316\u4e3a O(n)\u3002<\/p>\n\n\n\n
              \n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,12],"tags":[15,14],"class_list":["post-104","post","type-post","status-publish","format-standard","hentry","category-hash","category-algorithm","tag-hash","tag-algorithm"],"_links":{"self":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/comments?post=104"}],"version-history":[{"count":8,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/104\/revisions"}],"predecessor-version":[{"id":115,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/104\/revisions\/115"}],"wp:attachment":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/media?parent=104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/categories?post=104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/tags?post=104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}