{"id":995,"date":"2025-12-17T08:11:12","date_gmt":"2025-12-17T00:11:12","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=995"},"modified":"2025-12-17T08:11:12","modified_gmt":"2025-12-17T00:11:12","slug":"leetcode-20-%e6%9c%89%e6%95%88%e7%9a%84%e6%8b%ac%e5%8f%b7","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=995","title":{"rendered":"LeetCode 20 – \u6709\u6548\u7684\u62ec\u53f7"},"content":{"rendered":"

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

\u7ed9\u5b9a\u4e00\u4e2a\u53ea\u5305\u62ec ‘(‘\uff0c’)’\uff0c'{‘\uff0c’}’\uff0c'[‘\uff0c’]’ \u7684\u5b57\u7b26\u4e32 s \uff0c\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u6709\u6548\u3002
\n\u6709\u6548\u5b57\u7b26\u4e32\u9700\u6ee1\u8db3\uff1a
\n\u5de6\u62ec\u53f7\u5fc5\u987b\u7528\u76f8\u540c\u7c7b\u578b\u7684\u53f3\u62ec\u53f7\u95ed\u5408\u3002
\n\u5de6\u62ec\u53f7\u5fc5\u987b\u4ee5\u6b63\u786e\u7684\u987a\u5e8f\u95ed\u5408\u3002
\n\u6bcf\u4e2a\u53f3\u62ec\u53f7\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u76f8\u540c\u7c7b\u578b\u7684\u5de6\u62ec\u53f7\u3002<\/p>\n

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

\u4f7f\u7528\u6808\u8fdb\u884c\u6a21\u62df\uff0c\u9047\u5230\u5de6\u62ec\u53f7\u5165\u6808\uff0c\u9047\u5230\u53f3\u62ec\u53f7\u5219\u51fa\u6808\u8fdb\u884c\u5339\u914d<\/p>\n

Java<\/h1>\n
public boolean isValid(String s) {\n    Deque<Character> stack = new LinkedList<>();\n    HashMap<Character, Character> map = new HashMap<>();\n    map.put('(', ')');\n    map.put('{', '}');\n    map.put('[', ']');\n    for (int i = 0; i < s.length(); i++) {\n        Character ch = s.charAt(i);\n        if (map.containsKey(ch)) {\n            stack.push(ch);\n        } else if (stack.isEmpty() || !ch.equals(map.get(stack.pop()))) {\n            return false;\n        }\n    }\n    return stack.isEmpty();\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun isValid(s: String): Boolean {\n    val stack = LinkedList<Char>()\n    val map = mapOf(\n        Pair('(', ')'),\n        Pair('[', ']'),\n        Pair('{', '}'),\n    )\n    for (ch in s) {\n        if (ch in map.keys) {\n            stack.push(ch)\n        } else if (stack.isEmpty() || ch != map[stack.pop()]) {\n            return false\n        }\n    }\n    return stack.isEmpty()\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e00\u4e2a\u53ea\u5305\u62ec ‘(‘\uff0c’)’\uff0c'{‘\uff0c […]<\/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":[20,86],"class_list":["post-995","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-86"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/995","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=995"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/995\/revisions"}],"predecessor-version":[{"id":996,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/995\/revisions\/996"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}