mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
123 lines
3.0 KiB
C++
123 lines
3.0 KiB
C++
|
#include<cstdio>
|
||
|
#include<cmath>
|
||
|
#include<cstring>
|
||
|
#include<algorithm>
|
||
|
using namespace std;
|
||
|
#define MAXN 200100
|
||
|
int dp[MAXN][20];
|
||
|
char r[MAXN];
|
||
|
int sa[MAXN];
|
||
|
int wa[MAXN],wb[MAXN],wv[MAXN],ws[MAXN];
|
||
|
int height[MAXN],rk[MAXN];
|
||
|
int mm[MAXN];
|
||
|
int cas;
|
||
|
inline bool cmp(int *r,int a,int b,int len){
|
||
|
return r[a]==r[b]&&r[a+len]==r[b+len];
|
||
|
}
|
||
|
void SA(int n,int m){
|
||
|
int i,j,p,*x=wa,*y=wb,*t;
|
||
|
for(i=0;i<m;i++)
|
||
|
ws[i]=0;
|
||
|
for(i=0;i<n;i++)
|
||
|
ws[x[i]=r[i]]++;
|
||
|
for(i=1;i<m;i++)
|
||
|
ws[i]+=ws[i-1];
|
||
|
for(i=n-1;i>=0;i--)
|
||
|
sa[--ws[x[i]]]=i;
|
||
|
for(j=p=1;p<n;j<<=1,m=p){
|
||
|
for(p=0,i=n-j;i<n;i++)
|
||
|
y[p++]=i;
|
||
|
for(i=0;i<n;i++){
|
||
|
if(sa[i]>=j)
|
||
|
y[p++]=sa[i]-j;
|
||
|
}
|
||
|
for(i=0;i<m;i++)
|
||
|
ws[i]=0;
|
||
|
for(i=0;i<n;i++)
|
||
|
ws[wv[i]=x[y[i]]]++;
|
||
|
for(i=1;i<m;i++)
|
||
|
ws[i]+=ws[i-1];
|
||
|
for(i=n-1;i>=0;i--)
|
||
|
sa[--ws[wv[i]]]=y[i];
|
||
|
for(t=x,x=y,y=t,x[sa[0]]=0,p=i=1;i<n;i++)
|
||
|
x[sa[i]]=cmp(y,sa[i-1],sa[i],j)?p-1:p++;
|
||
|
}
|
||
|
}
|
||
|
void Height(int n){
|
||
|
int i,j,k=0;
|
||
|
for(i=0;i<=n;i++)
|
||
|
rk[sa[i]]=i;
|
||
|
for(i=0;i<n;height[rk[i++]]=k)
|
||
|
for(k?k--:0,j=sa[rk[i]-1];r[i+k]==r[j+k];k++);
|
||
|
}
|
||
|
int init(){
|
||
|
int i,j,len;
|
||
|
memset(height,0,sizeof(height));
|
||
|
len=strlen(r);
|
||
|
r[len]='$';
|
||
|
for(j=0;j<len;j++)
|
||
|
r[j+len+1]=r[len-1-j];
|
||
|
r[j+len+1]='\0';
|
||
|
return len*2+1;
|
||
|
}
|
||
|
void st(int n){
|
||
|
int i,j,p,q;
|
||
|
for(i=1;i<=n;i++)
|
||
|
dp[i][0]=i;
|
||
|
for(j=1;j<=mm[n];j++)
|
||
|
for(i=1;i+(1<<j)-1<=n;i++){
|
||
|
p=height[dp[i][j-1]];
|
||
|
q=height[dp[i+(1<<(j-1))][j-1]];
|
||
|
if(p>q)
|
||
|
dp[i][j]=dp[i+(1<<(j-1))][j-1];
|
||
|
else
|
||
|
dp[i][j]=dp[i][j-1];
|
||
|
}
|
||
|
}
|
||
|
int RMQ_MIN(int i,int j){
|
||
|
int tem;
|
||
|
if(i>j){
|
||
|
tem=i;
|
||
|
i=j;
|
||
|
j=tem;
|
||
|
}
|
||
|
i++;
|
||
|
int k=mm[(j-i+1)];
|
||
|
return min(height[dp[i][k]],height[dp[j-(1<<k)+1][k]]);
|
||
|
}
|
||
|
void solve(int n){
|
||
|
int i,j,ans=0,pre1=0,pre2=0;
|
||
|
st(n);
|
||
|
for(i=2;i<=n;i++){
|
||
|
pre1=min(pre1,height[i]);
|
||
|
j=RMQ_MIN(i,rk[n-1-sa[i]]);
|
||
|
if(j>pre1){
|
||
|
ans+=j-pre1;
|
||
|
pre1=j;
|
||
|
}
|
||
|
pre2=min(pre2,height[i]);
|
||
|
j=RMQ_MIN(i,rk[n-sa[i]]);
|
||
|
if(j>pre2){
|
||
|
ans+=j-pre2;
|
||
|
pre2=j;
|
||
|
}
|
||
|
}
|
||
|
printf("Case #%d: %d\n",cas,ans);
|
||
|
}
|
||
|
int main(){
|
||
|
int i,j,n,t,T;
|
||
|
mm[0]=-1;
|
||
|
for(i=1;i<MAXN;i++)
|
||
|
mm[i]=((i&(i-1))==0)?mm[i-1]+1:mm[i-1];
|
||
|
scanf("%d",&T);
|
||
|
cas=0;
|
||
|
for(t=1;t<=T;t++){
|
||
|
scanf("%s",r);
|
||
|
n=init();
|
||
|
SA(n+1,130);
|
||
|
Height(n);
|
||
|
cas++;
|
||
|
solve(n);
|
||
|
}
|
||
|
}
|