{"id":8,"date":"2022-06-04T10:52:00","date_gmt":"2022-06-04T02:52:00","guid":{"rendered":"http:\/\/ubuntu.tim-wcx.ltd\/wordpress\/index.php\/2022\/06\/04\/2021-02-02\/"},"modified":"2022-06-04T10:52:00","modified_gmt":"2022-06-04T02:52:00","slug":"2021-02-02","status":"publish","type":"post","link":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/2022\/06\/04\/2021-02-02\/","title":{"rendered":"2021-02-02"},"content":{"rendered":"<p><svg  style=\"display: none;\">\n                        <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path>\n                    <\/svg><\/p>\n<h3><a id=\"A_0\"><\/a>A\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/2021020223132796.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70\" alt=\"[\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20(img-9GyXebcX-1612278645745)(https:\/\/github.com\/WCX1024979076\/image1\/blob\/master\/img\/IZO3%60%256(P1HPWWA6ZY2)]XHC.png?raw=true)\"><\/p>\n<h4><a id=\"_3\"><\/a>\u9898\u89e3<\/h4>\n<p>\u7b7e\u5230\u9898\u76ee\uff0c\u7ed9\u5b9a\u4e09\u4e2a\u6570a,b\u548cc\uff0c\u9009\u62e9\u4e00\u4e2a\u6570x\uff0c\u4f7f\u5f97x-2<=a\uff0cx-1<=b\u4e14x<=c\uff0c\u6c423*x-3\u7684\u6700\u5927\u503c\u3002<\/p>\n<h4><a id=\"_7\"><\/a>\u4ee3\u7801<\/h4>\n<pre><code class=\"prism language-C++\">#include <bits\/stdc++.h>\n \nusing namespace std;\n \t\nint main()\n{\n    int a,b,c;\n    cin>>a>>b>>c;\n    int min1=min(a+2,min(b+1,c));\n    cout<<min1+min1-1+min1-2<<endl;\n}\n<\/code><\/pre>\n<h3><a id=\"B_23\"><\/a>B\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20210202231444977.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<h4><a id=\"_26\"><\/a>\u9898\u89e3<\/h4>\n<p>\u7ed9\u5b9a2 * n\u4e2a\u70b9\uff0c\u5728\u524dn\u4e2a\u70b9\u4e2d\u9009\u4e00\u4e2a\u70b9i\uff0c\u5728\u540en\u4e2a\u70b9\u4e2d\u9009\u4e00\u4e2a\u70b9j\uff0c\u6784\u9020\u4e00\u79cd\u5339\u914d\u65b9\u5f0f\u4f7f\u5f97\u4efb\u610f\u4e24\u70b9\u6a2a\u7eb5\u5750\u6807\u548c(xi+xj,yi+yj)\u5747\u76f8\u540c\u3002\u7531\u4e8exi+xj\u5747\u76f8\u540c\uff0c\u53ef\u4ee5\u628a\u8fd92 * n\u4e2a\u70b9\u7684x\u5750\u6807\u8fdb\u884c\u6c42\u548c\u7136\u540e\u5e73\u5747\u5206\u914d\u6210n\u4efd\uff0c\u8fd9\u6837\u5c31\u5f97\u5230\u4e86xi+xj\u7684\u5b9a\u503c\uff0cy\u5750\u6807\u540c\u7406\u3002\uff08\u6ce8\u610f\u5f00long long\uff09<\/p>\n<h4><a id=\"_30\"><\/a>\u4ee3\u7801<\/h4>\n<pre><code class=\"prism language-C++\">#include <bits\/stdc++.h>\n\nusing namespace std;\ntypedef long long ll;\nint main()\n{\n    ll n;\n    scanf(\"%lld\",&n);\n    ll sum1=0,sum2=0,x,y;\n    for(int i=1;i<=2*n;i++)\n    {\n        scanf(\"%lld%lld\",&#038;x,&#038;y);\n        sum1+=x,sum2+=y;\n    }\n    sum1\/=n,sum2\/=n;\n    cout<<sum1<<' '<<sum2<<endl;\n}\n<\/code><\/pre>\n<h3><a id=\"C_52\"><\/a>C\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20210202231506371.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<h4><a id=\"_57\"><\/a>\u9898\u89e3<\/h4>\n<p>\u8be5\u9898\u4e3a\u6253\u8868\u627e\u89c4\u5f8b\u6240\u505a\u51fa\u6765\u7684\uff0c\u5bb9\u6613\u53d1\u73b0\u8fd9\u4e9b\u6700\u5c0f\u503c\u6240\u5bf9\u5e94\u7684k\u53ef\u4ee5\u548cn\u7684\u56e0\u6570\u4e00\u4e00\u5bf9\u5e94\uff0c\u6240\u4ee5\u53ea\u9700\u8981\u679a\u4e3en\u7684\u56e0\u6570\u7136\u540e\u6c42\u51fa\u7ed3\u679c\u5373\u53ef\u3002<\/p>\n<h4><a id=\"_61\"><\/a>\u4ee3\u7801<\/h4>\n<pre><code class=\"prism language-C++\">#include <bits\/stdc++.h>\n\nusing namespace std;\ntypedef long long ll;\nset<ll>s;\nll n;\nll cal(ll x)\n{\n    ll size1=n\/x;\n    ll ans=size1+size1*(size1-1)\/2*x;\n    return ans;\n}\nint main()\n{\n    scanf(\"%lld\",&n);\n    for(int i=1;i<=sqrt(n);i++)\n    {\n        if(n%i==0)\n        {\n            s.insert(cal(i));\n            s.insert(cal(n\/i));\n        }\n    }\n    set<ll> ::iterator it=s.begin();\n    while(it!=s.end())\n    {\n        cout<<*it<<' ';\n        it++;\n    }\n    cout<<endl;\n}\n<\/code><\/pre>\n<h3><a id=\"D_97\"><\/a>D\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20210202231523196.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70\" alt=\"[\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20(img-HeUKMgrG-1612278645757)(https:\/\/raw.githubusercontent.com\/WCX1024979076\/image1\/master\/img\/123.png)]\"><\/p>\n<h4><a id=\"_102\"><\/a>\u9898\u89e3<\/h4>\n<p>\u8fd9\u91cc\u4ee5n=4\u4e3a\u4f8b<br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20210202234927173.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<ol>\n<li>\n<p>\u56db\u4e2a\u6570\u4e00\u7ec4\uff0c\u53ef\u4ee5\u7ec4\u62104! \u4e2a\u7b54\u6848<\/p>\n<\/li>\n<li>\n<p>\u7b2c\u4e00\u6392\u5f53\u4e2d \u6bcf\u4e00\u5bf9\u6570\u540e\u4e09\u4e2a \u548c \u4e0b\u4e00\u5bf9\u6570\u7684\u7b2c\u4e00\u4e2a \u7ec4\u6210\u4e00\u4e2a\u7b54\u6848\uff0c\u800c\u7b2c\u4e00\u6392\u4e2d\u6070\u67093! \u5bf9\u6570\uff0c\u6240\u4ee5\u7b54\u6848\u4e3a(3! - 1)*4<\/p>\n<\/li>\n<li>\n<p>\u7b2c\u4e00\u6392\u6709\u516d\u5bf9\u6570\uff0c\u53ef\u4ee5\u5212\u5206\u4e3a3\u7ec4\uff0c\u6bcf\u7ec4\u4e24\u4e2a\uff0c\u4e14\u6bcf\u7ec4\u4e2d \u4e0a\u4e00\u5bf9\u6570\u7684\u540e\u4e24\u4e2a \u548c \u4e0b\u4e00\u5bf9\u6570\u7684\u524d\u4e24\u4e2a \u7ec4\u6210\u7b54\u6848\uff0c\u6240\u4ee5\u7b54\u6848\u53c8\u5e94\u5f53\u52a0\u4e0a(2! - 1) * 4 * 3<\/p>\n<\/li>\n<li>\n<p>\u7efc\u4e0a\u7b54\u6848\u4e3a4! + (3! - 1) * 4 + (2! - 1) * 4 * 3 =56<\/p>\n<\/li>\n<li>\n<p>\u540c\u7406\uff0c5\u7684\u7b54\u6848\u4e3a\uff1a5! + (4! - 1) * 5 + (3! - 1) * 5 * 4 + (2! - 1) * 5 * 4 * 3 = 4 *5! - 5 - 5 *4 - 5 *4 *3 = 395<\/p>\n<\/li>\n<li>\n<p>\u6ce8\u610f\u7279\u52241 \uff01\uff01\uff01<\/p>\n<\/li>\n<\/ol>\n<h4><a id=\"_118\"><\/a>\u4ee3\u7801<\/h4>\n<pre><code class=\"prism language-c++\">#include <bits\/stdc++.h>\nusing namespace std;\ntypedef long long ll;\nll n;\nconst ll mod=998244353;\nint main()\n{\n    scanf(\"%lld\",&n);\n    if(n==1)\n    {\n        cout<<1<<endl;\n        return 0;\n    }\n    ll ans=1;\n    for(ll i=1;i<=n;i++)\n    {\n        ans=ans*i;\n        ans%=mod;\n    }\n    ans=ans*(n-1);\n    ans%=mod;\n    ll sum1=1;\n    for(ll i=n;i>=3;i--)\n    {\n        sum1*=i;\n        sum1%=mod;\n        ans=ans-sum1;\n        ans=(ans%mod+mod)%mod;\n    }\n    ans=(ans%mod+mod)%mod;\n    cout<<ans<<endl;\n}\n<\/code><\/pre>\n<h3><a id=\"I_155\"><\/a>I\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20210202231541665.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0ODg0OA==,size_16,color_FFFFFF,t_70\" alt=\"[\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20(img-LjUKDFK7-1612278645760)(https:\/\/raw.githubusercontent.com\/WCX1024979076\/image1\/master\/img\/1241253.png)]\"><\/p>\n<h4><a id=\"_160\"><\/a>\u9898\u89e3<\/h4>\n<p>\u56fe\u8bba\u9898\u76ee\uff0c\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u8282\u70b9\uff0c\u8be5\u70b9\u5230\u6839\u8282\u70b9\u7684\u6743\u503c\u6700\u5c0f\u503c\u5373\u4e3a\u5b50\u8282\u70b9\u6743\u503c\u7684\u6700\u5c0f\u503c\uff0c\u6240\u4ee5\u5148dfs\u786e\u5b9a-1\u70b9\u7684\u6743\u503cs[i]\uff0c\u7136\u540e\u6839\u636e\u5f97\u51fa\u7684\u6743\u503c\u8be5\u70b9\u6743\u503cs[i]\u548c\u7236\u8282\u70b9\u6743\u503cs[i]\u5224\u65ad\u662f\u5426\u7b26\u5408\u6761\u4ef6\u5e76\u6c42\u548c\u5f97\u51fa\u7b54\u6848\u3002<\/p>\n<h4><a id=\"_164\"><\/a>\u4ee3\u7801<\/h4>\n<pre><code class=\"prism language-C++\">#include <bits\/stdc++.h>\n#define inf 0x3f3f3f3f3f3f3f\nusing namespace std;\ntypedef long long ll;\nvector<ll>v[100500];\nll s[100500]={0};\nll fa[100500]={0};\nll dfs(ll k,ll fa)\n{\n    ll min1=inf;\n    for(int i:v[k])\n    {\n        if(i!=fa)\n        {\n            if(dfs(i,k)==-1)\n                return -1;\n            if(s[i]!=-1)\n                min1=min(min1,s[i]);\n        }\n    }\n    if(s[k]==-1)\n    {\n        if(min1!=inf)\n            s[k]=min1;\n    }\n    else\n    {\n        if(s[k]>min1)\n            return -1;\n    }\n    return 0;\n}\nll ans=0;\nll dfs1(ll k,ll fa,ll sum)\n{\n    if(s[k]==-1)\n        return 0;\n    if(s[k]<sum)\n        return -1;\n    sum=max(sum,s[k]);\n    ans=ans+s[k]-s[fa];\n    for(int i:v[k])\n    {\n        if(i!=fa)\n        {\n            if(dfs1(i,k,sum)==-1)\n                return -1;\n        }\n    }\n    return 0;\n}\nint main()\n{\n    ll n,m;\n    scanf(\"%lld\",&#038;n);\n    fa[1]=0;\n    for(ll i=2;i<=n;i++)\n    {\n        scanf(\"%lld\",&#038;m);\n        fa[i]=m;\n        v[i].push_back(m);\n        v[m].push_back(i);\n    }\n    for(ll i=1;i<=n;i++)\n        scanf(\"%lld\",&#038;s[i]);\n    s[0]=0;\n    if(dfs(1,-1)==-1)\n    {\n        printf(\"-1n\");\n        return 0;\n    }\n    if(dfs1(1,0,0)==-1)\n    {\n        printf(\"-1n\");\n        return 0;\n    }\n    cout<<ans<<endl;\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>A\u9898 \u9898\u89e3 \u7b7e\u5230\u9898\u76ee\uff0c\u7ed9\u5b9a\u4e09\u4e2a\u6570a,b\u548cc\uff0c\u9009\u62e9\u4e00&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts\/8","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/comments?post=8"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts\/8\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/media?parent=8"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/categories?post=8"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/tags?post=8"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}