{"id":879,"date":"2025-10-03T00:15:09","date_gmt":"2025-10-02T16:15:09","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=879"},"modified":"2025-10-03T00:15:09","modified_gmt":"2025-10-02T16:15:09","slug":"leetcode-438-%e6%89%be%e5%88%b0%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%ad%e6%89%80%e6%9c%89%e5%ad%97%e6%af%8d%e5%bc%82%e4%bd%8d%e8%af%8d","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=879","title":{"rendered":"LeetCode 438 \u2013 \u627e\u5230\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u6bcd\u5f02\u4f4d\u8bcd"},"content":{"rendered":"

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

\u7ed9\u5b9a\u4e24\u4e2a\u5b57\u7b26\u4e32 s \u548c p\uff0c\u627e\u5230 s \u4e2d\u6240\u6709 p \u7684 \u5f02\u4f4d\u8bcd \u7684\u5b50\u4e32\uff0c\u8fd4\u56de\u8fd9\u4e9b\u5b50\u4e32\u7684\u8d77\u59cb\u7d22\u5f15\u3002\u4e0d\u8003\u8651\u7b54\u6848\u8f93\u51fa\u7684\u987a\u5e8f\u3002<\/p>\n

\u793a\u4f8b 1:<\/p>\n

\u8f93\u5165: s = “cbaebabacd”, p = “abc”
\n\u8f93\u51fa: [0,6]
\n\u89e3\u91ca:
\n\u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 0 \u7684\u5b50\u4e32\u662f “cba”, \u5b83\u662f “abc” \u7684\u5f02\u4f4d\u8bcd\u3002
\n\u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 6 \u7684\u5b50\u4e32\u662f “bac”, \u5b83\u662f “abc” \u7684\u5f02\u4f4d\u8bcd\u3002
\n \u793a\u4f8b 2:<\/p>\n

\u8f93\u5165: s = “abab”, p = “ab”
\n\u8f93\u51fa: [0,1,2]
\n\u89e3\u91ca:
\n\u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 0 \u7684\u5b50\u4e32\u662f “ab”, \u5b83\u662f “ab” \u7684\u5f02\u4f4d\u8bcd\u3002
\n\u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 1 \u7684\u5b50\u4e32\u662f “ba”, \u5b83\u662f “ab” \u7684\u5f02\u4f4d\u8bcd\u3002
\n\u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 2 \u7684\u5b50\u4e32\u662f “ab”, \u5b83\u662f “ab” \u7684\u5f02\u4f4d\u8bcd\u3002<\/p>\n

\u63d0\u793a:<\/p>\n

1 <= s.length, p.length <= 3 * 10^4
\ns \u548c p \u4ec5\u5305\u542b\u5c0f\u5199\u5b57\u6bcd<\/p>\n

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

\u5f02\u4f4d\u8bcd\u7684\u957f\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u56e0\u6b64\u53ea\u8981\u4ece\u5de6\u5230\u53f3\u904d\u5386\u4e00\u904d\u5373\u53ef\uff0c\u6ed1\u52a8\u7a97\u53e3\u3002
\n\u91cd\u70b9\u662f\u5982\u4f55\u5224\u65ad\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5f02\u4f4d\u8bcd\uff0c\u7531\u4e8e\u9650\u5236\u4e3a\u5c0f\u5199\u5b57\u6bcd\uff0c\u6240\u4ee5\u53ef\u4ee5\u901a\u8fc7\u8bb0\u5f55\u6bcf\u4e2a\u5b57\u6bcd\u7684\u4e2a\u6570\u6765\u8fdb\u884c\u5224\u65ad\u3002\u5f00\u4e00\u4e2a\u6570\u7ec4\u7528\u4e8e\u8bb0\u5f55 p \u7684\u6bcf\u4e2a\u5b57\u6bcd\u7684\u6570\u91cf\uff0cp\u4e2d\u7684\u5b57\u6bcd\u8ba9\u8ba1\u6570+1\uff0c\u800c s \u5185\u7684\u5b57\u6bcd\u8ba9\u8ba1\u6570-1\u3002\u6bcf\u79fb\u52a8\u4e00\u6b21\u7a97\u53e3\uff0c\u5c31\u5224\u65ad\u8fd9\u4e2a\u6570\u7ec4\u662f\u4e0d\u662f\u5168\u4e3a0\uff0c\u5168\u4e3a0\u8bf4\u660e\u5f53\u524d\u7a97\u53e3\u4e2d\u7684\u5b57\u7b26\u4e32\u548c\u76ee\u6807p\u662f\u5f02\u4f4d\u8bcd\u3002
\n\u65f6\u95f4\u590d\u6742\u5ea6 O(n).<\/p>\n

Java<\/h1>\n
public List<Integer> findAnagrams(String s, String p) {\n    List<Integer> ans = new ArrayList<>();\n    int[] num = new int[26];\n    int size = p.length();\n    if (s.length() < size) {\n        return ans;\n    }\n    for (int i = 0; i < size; i++) {\n        num[p.charAt(i) - 'a']++;\n        num[s.charAt(i) - 'a']--;\n    }\n    for (int i = 0; i + size <= s.length(); i++) {\n        boolean allZero = true;\n        for (int t = 0; t < 26; t++) {\n            if (num[t] != 0) {\n                allZero = false;\n                break;\n            }\n        }\n        if (allZero) {\n            ans.add(i);\n        }\n\n        if (i + size < s.length()) {\n            num[s.charAt(i) - 'a']++;\n            num[s.charAt(i + size) - 'a']--;\n        }\n    }\n\n    return ans;\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun findAnagrams(s: String, p: String): List<Int> {\n    val ans = ArrayList<Int>()\n    val num = IntArray(26)\n    val size = p.length\n    if (s.length < p.length) {\n        return ans\n    }\n    for (i in 0 until size) {\n        num[p[i] - 'a']++\n        num[s[i] - 'a']--\n    }\n\n    for (i in 0..s.length - size) {\n        if (num.all { it == 0 }) {\n            ans.add(i)\n        }\n\n        if (i + size < s.length) {\n            num[s[i] - 'a']++\n            num[s[i + size] - 'a']--\n        }\n    }\n\n    return ans\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e24\u4e2a\u5b57\u7b26\u4e32 s \u548c p\uff0c\u627e\u5230 s \u4e2d\u6240\u6709 p \u7684 \u5f02\u4f4d\u8bcd \u7684\u5b50\u4e32\uff0c\u8fd4\u56de\u8fd9\u4e9b\u5b50\u4e32\u7684\u8d77\u59cb\u7d22\u5f15\u3002\u4e0d\u8003\u8651 […]<\/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":[20,75,74,77],"class_list":["post-879","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-75","tag-74","tag-77"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/879","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=879"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/879\/revisions"}],"predecessor-version":[{"id":880,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/879\/revisions\/880"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}