{"id":2738,"date":"2022-04-14T11:17:55","date_gmt":"2022-04-14T03:17:55","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2738"},"modified":"2022-04-14T22:41:32","modified_gmt":"2022-04-14T14:41:32","slug":"%e7%ae%97%e6%b3%95%e5%85%a5%e9%97%a8%e7%ac%ac%e4%ba%94%e5%a4%a9-2","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2738","title":{"rendered":"\u7b97\u6cd5\u5165\u95e8\u7b2c\u4e94\u5929"},"content":{"rendered":"\n

438. \u627e\u5230\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u6bcd\u5f02\u4f4d\u8bcd<\/a><\/p>\n\n\n\n

\u8fd8\u662f\u8981\u4f7f\u7528\u6b20\u8d26\u6cd5\uff0c\u6548\u7387\u9ad8\uff0c\u6211\u81ea\u5df1\u5199\u7684\u53ea\u80fd\u6253\u8d2520%\u3002\u3002<\/p>\n\n\n\n

\u7ecf\u6d4b\u8bd5\uff0c\u6b64\u65b9\u6cd5\u4e5f\u9002\u7528\u4e8e567\u9898\u89e3\u7b54<\/p>\n\n\n\n


\/**
<\/em> 438. \u627e\u5230\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u6bcd\u5f02\u4f4d\u8bcd
<\/em> \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
<\/em>
<\/em> \u5f02\u4f4d\u8bcd \u6307\u7531\u76f8\u540c\u5b57\u6bcd\u91cd\u6392\u5217\u5f62\u6210\u7684\u5b57\u7b26\u4e32\uff08\u5305\u62ec\u76f8\u540c\u7684\u5b57\u7b26\u4e32\uff09\u3002
<\/em>
<\/em>
<\/em>
<\/em> \u793a\u4f8b 1:
<\/em>
<\/em> \u8f93\u5165: s = \"cbaebabacd\", p = \"abc\"
<\/em> \u8f93\u51fa: [0,6]
<\/em> \u89e3\u91ca:
<\/em> \u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 0 \u7684\u5b50\u4e32\u662f \"cba\", \u5b83\u662f \"abc\" \u7684\u5f02\u4f4d\u8bcd\u3002
<\/em> \u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 6 \u7684\u5b50\u4e32\u662f \"bac\", \u5b83\u662f \"abc\" \u7684\u5f02\u4f4d\u8bcd\u3002
<\/em> \u793a\u4f8b 2:
<\/em>
<\/em> \u8f93\u5165: s = \"abab\", p = \"ab\"
<\/em> \u8f93\u51fa: [0,1,2]
<\/em> \u89e3\u91ca:
<\/em> \u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 0 \u7684\u5b50\u4e32\u662f \"ab\", \u5b83\u662f \"ab\" \u7684\u5f02\u4f4d\u8bcd\u3002
<\/em> \u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 1 \u7684\u5b50\u4e32\u662f \"ba\", \u5b83\u662f \"ab\" \u7684\u5f02\u4f4d\u8bcd\u3002
<\/em> \u8d77\u59cb\u7d22\u5f15\u7b49\u4e8e 2 \u7684\u5b50\u4e32\u662f \"ab\", \u5b83\u662f \"ab\" \u7684\u5f02\u4f4d\u8bcd\u3002
<\/em>
<\/em>
<\/em> \u63d0\u793a:
<\/em>
<\/em> 1 <= s.length, p.length <= 3 * 10^4
<\/em> s \u548c p \u4ec5\u5305\u542b\u5c0f\u5199\u5b57\u6bcd
<\/em>
<\/em> * <\/em>@author <\/em><\/strong>zeroheart
<\/em> *
<\/em> *\/
<\/em>public class Question438 {
    public static List<Integer> findAnagrams(String s, String p) {
        \/\/ \u7ecf\u6d4b\u8bd5\uff0c\u6b64\u65b9\u6cd5\u4e5f\u9002\u7528\u4e8e567\u9898\u89e3\u7b54

        ArrayList<Integer> ans = new ArrayList<>();
        if (s.length() < p.length()) {
            return ans;
        }

        int[] counts = new int[26]; \/\/ \u6b20\u8d26\u8868\uff1a\u6b20\u7684\u5b57\u7b26 -> \u6b20\u7684\u4e2a\u6570
        int all = p.length(); \/\/ \u603b\u6b20\u8d26\u6570\u76ee
        \/\/ \u7edf\u8ba1\u6b20\u8d26\uff0c\u751f\u6210\u6b20\u8d26\u8868:
        for (char c : p.toCharArray()) {
            counts[c-'a']++;
        }

        \/\/ \u3010\u6ed1\u52a8\u7a97\u53e3\u3011\u8fd8\u8d26\uff1a
        int l = 0, r = 0, n = s.length();
        char[] str = s.toCharArray();

        while(l < n){
            while(r<n && counts[str[r] - 'a'] > 0){
                all--;
                counts[str[r] - 'a']--;
                r++;
            }

            if(all == 0){
                ans.add(l);
            }

            all++;
            counts[str[l] - 'a']++;
            l++;
        }

        return ans;

        \/\/ \u6ed1\u52a8\u7a97\u53e3\uff0c\u81ea\u5df1\u5199\u7684\u6548\u7387\u4e0d\u9ad8
        \/\/        List res = new ArrayList();
        \/\/        int[] stat = new int[26];
        \/\/        char[] sc = s.toCharArray();
        \/\/        char[] pc = p.toCharArray();
        \/\/        for(int i = 0; i<pc.length; i++){
        \/\/            char pci = pc[i];
        \/\/            stat[pci-'a']++;
        \/\/        }
        \/\/
        \/\/        for(int i = 0; i <= sc.length - pc.length; i++){
        \/\/            int[] stati = Arrays.copyOf(stat, stat.length);
        \/\/            int flag = 1;
        \/\/            for(int j = 0; j<pc.length; j++){
        \/\/                char scij = sc[i+j];
        \/\/                if(stati[scij - 'a'] == 0){
        \/\/                    flag = 0;
        \/\/                    break;
        \/\/                }else {
        \/\/                    stati[scij - 'a']--;
        \/\/                }
        \/\/            }
        \/\/            if(flag==1){
        \/\/                res.add(i);
        \/\/            }
        \/\/        }
        \/\/
        \/\/        return res;
    }

    public static void main(String[] args) {
        \/\/System.out.println(findAnagrams(\"cbaebabacd\",\"abc\"));
        System.out<\/em>.println(findAnagrams<\/em>(\"abab\",\"ab\"));
    }
}<\/pre>\n\n\n\n
713. \u4e58\u79ef\u5c0f\u4e8eK\u7684\u5b50\u6570\u7ec4<\/a><\/p>\n\n\n\n
\u5bf9\u4e8eabc\uff0c\u589e\u52a0\u4e86d\u4e4b\u540e\uff0c\u65b0\u589e\u52a0\u7684\u53ef\u80fd\u6027\u4e3ad,cd,bcd,abcd = r – l + 1;<\/mark><\/p>\n\n\n\n

\/**
<\/em> 713. \u4e58\u79ef\u5c0f\u4e8eK\u7684\u5b50\u6570\u7ec4
<\/em> \u7ed9\u5b9a\u4e00\u4e2a\u6b63\u6574\u6570\u6570\u7ec4 nums\u548c\u6574\u6570 k \u3002
<\/em>
<\/em> \u8bf7\u627e\u51fa\u8be5\u6570\u7ec4\u5185\u4e58\u79ef\u5c0f\u4e8e k \u7684\u8fde\u7eed\u7684\u5b50\u6570\u7ec4\u7684\u4e2a\u6570\u3002
<\/em>
<\/em>
<\/em>
<\/em> \u793a\u4f8b 1:
<\/em>
<\/em> \u8f93\u5165: nums = [10,5,2,6], k = 100
<\/em> \u8f93\u51fa: 8
<\/em> \u89e3\u91ca: 8\u4e2a\u4e58\u79ef\u5c0f\u4e8e100\u7684\u5b50\u6570\u7ec4\u5206\u522b\u4e3a: [10], [5], [2], [6], [10,5], [5,2], [2,6], [5,2,6]\u3002
<\/em> \u9700\u8981\u6ce8\u610f\u7684\u662f [10,5,2] \u5e76\u4e0d\u662f\u4e58\u79ef\u5c0f\u4e8e100\u7684\u5b50\u6570\u7ec4\u3002
<\/em> \u793a\u4f8b 2:
<\/em>
<\/em> \u8f93\u5165: nums = [1,2,3], k = 0
<\/em> \u8f93\u51fa: 0
<\/em>
<\/em>
<\/em> \u63d0\u793a:
<\/em>
<\/em> 1 <= nums.length <= 3 * 10^4
<\/em> 1 <= nums[i] <= 1000
<\/em> 0 <= k <= 10^6
<\/em>
<\/em>
<\/em> * <\/em>@author <\/em><\/strong>zeroheart
<\/em> *
<\/em> *\/
<\/em>public class Question713 {
    public int numSubarrayProductLessThanK(int[] nums, int k) {
        \/\/ \u5bf9\u4e8eabc\uff0c\u589e\u52a0\u4e86d\u4e4b\u540e\uff0c\u65b0\u589e\u52a0\u7684\u53ef\u80fd\u6027\u4e3ad,cd,bcd,abcd = r - l + 1;

        if(k<=1){
            return 0;
        }

        int len = nums.length;
        int left = 0;
        int res = 0;
        int pre = 1;
        for(int i = 0; i<len; i++){
            pre = pre * nums[i];
            while (pre >= k){
                pre = pre \/ nums[left];
                left++;
            }
            res += i - left + 1;
        }

        return res;
    }

    public static void main(String[] args) {
    }
}<\/pre>\n\n\n\n
209. \u957f\u5ea6\u6700\u5c0f\u7684\u5b50\u6570\u7ec4<\/a><\/p>\n\n\n\n

\/**
<\/em> 209. \u957f\u5ea6\u6700\u5c0f\u7684\u5b50\u6570\u7ec4
<\/em> \u7ed9\u5b9a\u4e00\u4e2a\u542b\u6709 n \u4e2a\u6b63\u6574\u6570\u7684\u6570\u7ec4\u548c\u4e00\u4e2a\u6b63\u6574\u6570 target \u3002
<\/em>
<\/em> \u627e\u51fa\u8be5\u6570\u7ec4\u4e2d\u6ee1\u8db3\u5176\u548c \u2265 target \u7684\u957f\u5ea6\u6700\u5c0f\u7684 \u8fde\u7eed\u5b50\u6570\u7ec4 [numsl, numsl+1, ..., numsr-1, numsr] \uff0c\u5e76\u8fd4\u56de\u5176\u957f\u5ea6\u3002\u5982\u679c\u4e0d\u5b58\u5728\u7b26\u5408\u6761\u4ef6\u7684\u5b50\u6570\u7ec4\uff0c\u8fd4\u56de 0 \u3002
<\/em>
<\/em>
<\/em>
<\/em> \u793a\u4f8b 1\uff1a
<\/em>
<\/em> \u8f93\u5165\uff1atarget = 7, nums = [2,3,1,2,4,3]
<\/em> \u8f93\u51fa\uff1a2
<\/em> \u89e3\u91ca\uff1a\u5b50\u6570\u7ec4 [4,3] \u662f\u8be5\u6761\u4ef6\u4e0b\u7684\u957f\u5ea6\u6700\u5c0f\u7684\u5b50\u6570\u7ec4\u3002
<\/em> \u793a\u4f8b 2\uff1a
<\/em>
<\/em> \u8f93\u5165\uff1atarget = 4, nums = [1,4,4]
<\/em> \u8f93\u51fa\uff1a1
<\/em> \u793a\u4f8b 3\uff1a
<\/em>
<\/em> \u8f93\u5165\uff1atarget = 11, nums = [1,1,1,1,1,1,1,1]
<\/em> \u8f93\u51fa\uff1a0
<\/em>
<\/em>
<\/em> \u63d0\u793a\uff1a
<\/em>
<\/em> 1 <= target <= 10^9
<\/em> 1 <= nums.length <= 10^5
<\/em> 1 <= nums[i] <= 10^5
<\/em>
<\/em>
<\/em> \u8fdb\u9636\uff1a
<\/em>
<\/em> \u5982\u679c\u4f60\u5df2\u7ecf\u5b9e\u73b0 O(n) \u65f6\u95f4\u590d\u6742\u5ea6\u7684\u89e3\u6cd5, \u8bf7\u5c1d\u8bd5\u8bbe\u8ba1\u4e00\u4e2a O(n log(n)) \u65f6\u95f4\u590d\u6742\u5ea6\u7684\u89e3\u6cd5\u3002
<\/em>
<\/em> * <\/em>@author <\/em><\/strong>zeroheart
<\/em> *
<\/em> *\/
<\/em>public class Question209 {
    public int minSubArrayLen(int target, int[] nums) {
        int left = 0;
        int res = Integer.MAX_VALUE<\/em>;
        int pre = 0;
        int length = nums.length;
        for(int i = 0; i<length; i++){
            pre += nums[i];
            while (pre>=target){
                res = Math.min<\/em>(res, i - left + 1); \/\/ \u653e\u5728\u524d\u9762
                pre = pre - nums[left];
                left++;
            }
        }

        return res>length ? 0:res;
    }

    public static void main(String[] args) {
    }
}<\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
438. \u627e\u5230\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u6bcd\u5f02\u4f4d\u8bcd \u8fd8\u662f\u8981\u4f7f\u7528\u6b20\u8d26\u6cd5\uff0c\u6548\u7387\u9ad8\uff0c\u6211\u81ea\u5df1\u5199\u7684\u53ea\u80fd\u6253\u8d2520%\u3002\u3002 \u7ecf\u6d4b\u8bd5\uff0c\u6b64\u65b9\u6cd5\u4e5f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[155],"tags":[157],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2738"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2738"}],"version-history":[{"count":13,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2738\/revisions"}],"predecessor-version":[{"id":2751,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2738\/revisions\/2751"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}