后缀数组 模板 （敲定）

#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;

const int max_n=2e5+5;

int n,m=300,sa[max_n],c[max_n],x[max_n],y[max_n],rank[max_n],height[max_n];
char s[max_n];

inline void build_sa(){
for (int i=0;i<m;++i) c[i]=0;
for (int i=0;i<n;++i) c[x[i]=s[i]]++;
for (int i=1;i<m;++i) c[i]+=c[i-1];
for (int i=n-1;i>=0;--i) sa[--c[x[i]]]=i;

for (int k=1;k<=n;k<<=1){
int p=0;
for (int i=n-k;i<n;++i) y[p++]=i;
for (int i=0;i<n;++i) if (sa[i]>=k) y[p++]=sa[i]-k;

for (int i=0;i<m;++i) c[i]=0;
for (int i=0;i<n;++i) c[x[y[i]]]++;
for (int i=1;i<m;++i) c[i]+=c[i-1];
for (int i=n-1;i>=0;--i) sa[--c[x[y[i]]]]=y[i];

swap(x,y);
p=1; x[sa[0]]=0;
for (int i=1;i<n;++i) x[sa[i]]=y[sa[i-1]]==y[sa[i]]&&
((sa[i-1]+k>=n?-1:y[sa[i-1]+k])==(sa[i]+k>=n?-1:y[sa[i]+k]))?p-1:p++;
if (p>n) break;
m=p;
}
}

inline void build_lcp(){
for (int i=0;i<n;++i) rank[sa[i]]=i;
height[0]=0;
int k=0;
for (int i=0;i<n;++i){
if (!rank[i]) continue;
if (k) --k;
int j=sa[rank[i]-1];
while (i+k<n&&j+k<n&&s[i+k]==s[j+k]) ++k;
height[rank[i]]=k;
}
}

int main(){
gets(s);
n=strlen(s);
build_sa();
build_lcp();
for (int i=0;i<n;++i) printf("%d%c",sa[i]+1," \n"[i==n-1]);
for (int i=0;i<n;++i) printf("%d%c",height[i]," \n"[i==n-1]);
}