开发app的网站有哪些,网站开发毕业设计收获与体会,域名注册网,做混剪素材下载网站传送门 文章目录题意#xff1a;思路#xff1a;题意#xff1a; 思路#xff1a; 转换一下题意#xff0c;就是求一个最小公共前后缀#xff0c;显然可以暴跳nenene数组#xff0c;复杂度O(n2)O(n^2)O(n2)#xff0c;注意到我们每次都跳的话会跳到很多重复的位置思路题意 思路 转换一下题意就是求一个最小公共前后缀显然可以暴跳nenene数组复杂度O(n2)O(n^2)O(n2)注意到我们每次都跳的话会跳到很多重复的位置假设当前跳到了xxx我们每次跳完都将当前ne[i]xne[i]xne[i]x这样就会减少很多不必要的跳复杂度O(n)O(n)O(n)。 // Problem: P3435 [POI2006]OKR-Periods of Words // Contest: Luogu // URL: https://www.luogu.com.cn/problem/P3435 // Memory Limit: 128 MB // Time Limit: 1000 ms // // Powered by CP Editor (https://cpeditor.org)//#pragma GCC optimize(Ofast,no-stack-protector,unroll-loops,fast-math) //#pragma GCC target(sse,sse2,sse3,ssse3,sse4.1,sse4.2,avx,avx2,popcnt,tunenative) //#pragma GCC optimize(2) #includecstdio #includeiostream #includestring #includecstring #includemap #includecmath #includecctype #includevector #includeset #includequeue #includealgorithm #includesstream #includectime #includecstdlib #includerandom #includecassert #define X first #define Y second #define L (u1) #define R (u1|1) #define pb push_back #define mk make_pair #define Mid ((tr[u].ltr[u].r)1) #define Len(u) (tr[u].r-tr[u].l1) #define random(a,b) ((a)rand()%((b)-(a)1)) #define db puts(---) using namespace std;//void rd_cre() { freopen(d://dp//data.txt,w,stdout); srand(time(NULL)); } //void rd_ac() { freopen(d://dp//data.txt,r,stdin); freopen(d://dp//AC.txt,w,stdout); } //void rd_wa() { freopen(d://dp//data.txt,r,stdin); freopen(d://dp//WA.txt,w,stdout); }typedef long long LL; typedef unsigned long long ULL; typedef pairint,int PII;const int N1000010,mod1e97,INF0x3f3f3f3f; const double eps1e-6;int n; char s[N]; int ne[N]; int ans[N];int main() { // ios::sync_with_stdio(false); // cin.tie(0);scanf(%d%s,n,s1);for(int i2,j0;in;i) {while(js[i]!s[j1]) jne[j];if(s[i]s[j1]) j;ne[i]j;}LL res0;for(int i2;in;i) {int xne[i];while(ne[x]0) xne[x];ne[i]x;res(i-x)i? 0:(i-x);}printf(%lld\n,res);return 0; } /**/