b数组开M大小
by 辰星凌 @ 2020-06-26 07:02:44
@[Aohrty](/user/347944)
by 辰星凌 @ 2020-06-26 07:03:05
修改了你的代码：```cpp
#include<iostream>
#include<cstring>
#include<cstdio>
#pragma GCC optimize("Ofast")
#define reg register
using namespace std;
const int M=1e6+5;
char s[M];
int n,m,b[M],x[M],y[M],suff[M];
void suffix_array(){
int k,m=1<<7,num;
for(reg int i=1;i<=n;++i)++b[x[i]=s[i]];
for(reg int i=1;i<=m;++i)b[i]+=b[i-1];
for(reg int i=n;i;--i)suff[b[x[i]]--]=i;
for(reg int k=1;k<=n;k<<=1){
num=0;
for(reg int i=n-k+1;i<=n;++i)y[++num]=i;
for(reg int i=1;i<=n;++i)if(suff[i]>k)y[++num]=suff[i]-k;
for(reg int i=1;i<=m;++i)b[i]=0;
for(reg int i=1;i<=n;++i)++b[x[i]];
for(reg int i=1;i<=m;++i)b[i]+=b[i-1];
for(reg int i=n;i;--i)suff[b[x[y[i]]]--]=y[i],y[i]=0;
swap(x,y);
x[suff[num=1]]=1;
for(reg int i=2;i<=n;++i){
if(y[suff[i]]!=y[suff[i-1]]||y[suff[i]+k]!=y[suff[i-1]+k])++num;
x[suff[i]]=num;
}
if(num==n)return;
m=num;
}
}
signed main(){
scanf("%s",s+1);
n=strlen(s+1);
suffix_array();
for(reg int k=1;k<=n;++k)printf("%d ",suff[k]);
}
```
by Fat_Fish @ 2020-06-26 08:18:25
```cpp
#include<iostream>
#include<cstring>
#include<cstdio>
#pragma GCC optimize("Ofast")
#define reg register
using namespace std;
const int M=1e6+5;
char s[M];
int n,m,b[M],x[M],y[M],suff[M];
void suffix_array(){
int k,m=1<<7,num;
for(reg int i=1;i<=n;++i)++b[x[i]=s[i]];
for(reg int i=1;i<=m;++i)b[i]+=b[i-1];
for(reg int i=n;i;--i)suff[b[x[i]]--]=i;
for(reg int k=1;k<=n;k<<=1){
num=0;
for(reg int i=n-k+1;i<=n;++i)y[++num]=i;
for(reg int i=1;i<=n;++i)if(suff[i]>k)y[++num]=suff[i]-k;
for(reg int i=1;i<=m;++i)b[i]=0;
for(reg int i=1;i<=n;++i)++b[x[i]];
for(reg int i=1;i<=m;++i)b[i]+=b[i-1];
for(reg int i=n;i;--i)suff[b[x[y[i]]]--]=y[i],y[i]=0;
swap(x,y);
x[suff[num=1]]=1;
for(reg int i=2;i<=n;++i){
if(y[suff[i]]!=y[suff[i-1]]||y[suff[i]+k]!=y[suff[i-1]+k])++num;
x[suff[i]]=num;
}
if(num==n)return;
m=num;
}
}
signed main(){
scanf("%s",s+1);
n=strlen(s+1);
suffix_array();
for(reg int k=1;k<=n;++k)printf("%d ",suff[k]);
}
```
by Fat_Fish @ 2020-06-26 08:18:47
`@秋名山秋刀鱼` ~~希丰展？使Md~~
by derta @ 2020-06-26 13:21:21
感谢各路神仙.jpeg
A了qwq
by Vigna @ 2020-06-26 13:57:17