{"id":908,"date":"2025-10-25T18:08:16","date_gmt":"2025-10-25T10:08:16","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=908"},"modified":"2025-10-25T18:08:16","modified_gmt":"2025-10-25T10:08:16","slug":"leetcode-240-%e6%90%9c%e7%b4%a2%e4%ba%8c%e7%bb%b4%e7%9f%a9%e9%98%b5-ii","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=908","title":{"rendered":"LeetCode 240 \u2013 \u641c\u7d22\u4e8c\u7ef4\u77e9\u9635 II"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h1>\n

\u7f16\u5199\u4e00\u4e2a\u9ad8\u6548\u7684\u7b97\u6cd5\u6765\u641c\u7d22 m x n \u77e9\u9635 matrix \u4e2d\u7684\u4e00\u4e2a\u76ee\u6807\u503c target \u3002\u8be5\u77e9\u9635\u5177\u6709\u4ee5\u4e0b\u7279\u6027\uff1a<\/p>\n

\u6bcf\u884c\u7684\u5143\u7d20\u4ece\u5de6\u5230\u53f3\u5347\u5e8f\u6392\u5217\u3002
\n\u6bcf\u5217\u7684\u5143\u7d20\u4ece\u4e0a\u5230\u4e0b\u5347\u5e8f\u6392\u5217\u3002<\/p>\n

\u793a\u4f8b1
\n\"\"<\/a>
\n\u8f93\u5165\uff1amatrix = [[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 5
\n\u8f93\u51fa\uff1atrue<\/p>\n

\u9898\u76ee\u5206\u6790<\/h1>\n

\u4e8c\u5206\u67e5\u627e<\/h2>\n

\u6bcf\u4e00\u884c\u4e8c\u5206\u67e5\u627e\u4e00\u6b21
\n\u65f6\u95f4\u590d\u6742\u5ea6 O(m * log n)<\/p>\n

\u8d2a\u5fc3<\/h2>\n

\u4ece\u5de6\u4e0a\u89d2\u5f00\u59cb\u67e5\u627e\uff0c\u4f1a\u53d1\u73b0\u8981\u540c\u65f6\u9762\u4e34\u5411\u53f3\u548c\u5411\u4e0b\u4e24\u4e2a\u9009\u62e9\u3002
\n\u4f46\u5982\u679c\u628a\u53f3\u4e0a\u89d2\u4f5c\u4e3a\u521d\u59cb\u70b9\uff0c\u6bcf\u6b21\u79fb\u52a8\u5c31\u53ea\u5b58\u5728\u4e00\u4e2a\u9009\u62e9\uff1a
\n– \u5982\u679c\u6bd4 target \u5c0f\uff0c\u5219\u5411\u4e0b\u8d70
\n– \u5982\u679c\u6bd4 target \u5927\uff0c\u5219\u5411\u5de6\u8d70<\/p>\n

\u56e0\u6b64\u4ece\u53f3\u4e0a\u89d2\u5f00\u59cb\u679a\u4e3e\u5373\u53ef\uff0c\u65f6\u95f4\u590d\u6742\u5ea6 O(m + n)
\n\u5f53\u7136\uff0c\u4ece\u5de6\u4e0b\u89d2\u5f00\u59cb\u679a\u4e3e\u4e5f\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n

Java<\/h1>\n
public boolean searchMatrix1(int[][] matrix, int target) {\n    for (int[] row : matrix) {\n        if (Arrays.binarySearch(row, target) >= 0) {\n            return true;\n        }\n    }\n    return false;\n}\n\npublic boolean searchMatrix2(int[][] matrix, int target) {\n    int m = matrix.length, n = matrix[0].length;\n    int i = 0, j = n - 1;\n    while (i < m && j >= 0) {\n        if (matrix[i][j] > target) {\n            j--;\n        } else if (matrix[i][j] < target) {\n            i++;\n        } else {\n            return true;\n        }\n    }\n    return false;\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun searchMatrix1(matrix: Array<IntArray>, target: Int): Boolean {\n    for (row in matrix) {\n        if (row.binarySearch(target) >= 0) {\n            return true\n        }\n    }\n    return false\n}\n\nfun searchMatrix2(matrix: Array<IntArray>, target: Int): Boolean {\n    val m = matrix.size\n    val n = matrix[0].size\n    var i = 0\n    var j = n - 1\n    while (i < m && j >= 0) {\n        if (matrix[i][j] > target) {\n            j--\n        } else if (matrix[i][j] < target) {\n            i++\n        } else {\n            return true\n        }\n    }\n\n    return false\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7f16\u5199\u4e00\u4e2a\u9ad8\u6548\u7684\u7b97\u6cd5\u6765\u641c\u7d22 m x n \u77e9\u9635 matrix \u4e2d\u7684\u4e00\u4e2a\u76ee\u6807\u503c target \u3002\u8be5\u77e9\u9635\u5177\u6709 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[20,32,83,62],"class_list":["post-908","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-32","tag-83","tag-62"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=908"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/908\/revisions"}],"predecessor-version":[{"id":909,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/908\/revisions\/909"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}