4
8
2015
1

【模板】后缀数组

啊一只不知道正确性的模板。

刚写完还没应用过

找到错误了会改的(求找错。。。)

主要是看着

http://blog.csdn.net/xymscau/article/details/8798046

http://wenku.baidu.com/link?url=cCmzid8m65q_x4MgP9QPPdyt-hY4auSH2tuFaYsz7e2vz3mAbq66WQ-YZ2z6bv2MRVOuh99DzVS8BIRT1vYvt5ziGEaP0ePhoZY3U6Z5Ff3

写(抄)的。。。

#include <cstdio>
#include <algorithm>
#define maxn 100005
using namespace std;
int a[maxn],b[maxn],c,d,e,f,g,h,i,j,k,l,m,n;
int R[maxn],K[maxn],cnt[maxn],up,rk[maxn],sa[maxn],id[maxn],height[maxn];

inline bool cmp(int *s,int a,int b,int l){return s[a]==s[b]&&s[a+l]==s[b+l];}

void getsa(){
	int d=1,p=0,*k=K,*r=R;
	for(i=up=0;i<n;i++)up=max(up,a[i]);up++;
	for(i=0;i<up;i++)cnt[i]=0;
	for(i=0;i<n;i++)cnt[k[i]=a[i]]++; k[n]=-1;
	for(i=0;i<up;i++)cnt[i+1]+=cnt[i];
	for(i=n-1;i>=0;i--)sa[--cnt[k[i]]]=i;
	for(;p<n;up=p,d<<=1){
		for(i=n-d,p=0;i<n;i++)r[p++]=i;
		for(i=0;i<n;i++)if(sa[i]>=d)r[p++]=sa[i]-d;
		for(i=0;i<up;i++)cnt[i]=0;
		for(i=0;i<n;i++)cnt[k[r[i]]]++;
		for(i=0;i<up;i++)cnt[i+1]+=cnt[i];
		for(i=n-1;i>=0;i--)sa[--cnt[k[r[i]]]]=r[i];
		swap(k,r);k[sa[0]]=0;
		for(i=1,p=1;i<n;i++)
		if(cmp(r,sa[i-1],sa[i],d))k[sa[i]]=p-1;
		else k[sa[i]]=p++;
	}
}
void getheight(){
	for(int i=0,p=0;i<n-1;i++){
		j=sa[rk[i]-1];
		while(a[i+p]==a[j+p])p++;
		height[rk[i]]=p;
		if(p)p--;
	}
}
int main(){
	freopen("in.in","r",stdin);
	scanf("%d",&n);
	for(i=0;i<n;i++)scanf("%d",&a[i]);
	a[n++]=0;
	getsa();
	getheight();
	for(i=0;i<n-1;i++)printf("%d ",sa[i]);printf("\n");
	for(i=0;i<n-1;i++)printf("%d ",height[i]);printf("\n");
	return 0;
}
做了一点修改,以后会加上注释?
sa的计算拍起来了?貌似没问题?
height的那段正确性还要验证下。。
Category: BZOJ | Tags: | Read Count: 1219
Barbara Molina 说:
2020年2月25日 16:41

The official norm is practised for the kids. Improvement of the joy and ukessay.com writing is assumed for the rumours. Factor is implied for the turns. The statement is invited for the true and crucial teems for the field.


登录 *


loading captcha image...
(输入验证码)
or Ctrl+Enter

Host by is-Programmer.com | Power by Chito 1.3.3 beta | Theme: Aeros 2.0 by TheBuckmaker.com