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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#303632 | #5065. Beautiful String | erduolong | RE | 1ms | 4424kb | C++20 | 1.9kb | 2024-01-12 20:29:48 | 2024-01-12 20:29:48 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int N=5005;
int T,n,bu[N];
char s[N];
namespace SA{
int x[N],y[N],c[N],sa[N],rk[N],h[N],st[N][19],lg[N];
inline void get_sa(){
memset(x,0,sizeof(x));
memset(y,0,sizeof(y));
memset(sa,0,sizeof(sa));
memset(h,0,sizeof(h));
memset(rk,0,sizeof(rk));
memset(st,0,sizeof(st));
memset(c,0,sizeof(c));
int m=300;
for(int i=1;i<=n;i++) c[x[i]=s[i]]++;
for(int i=1;i<=m;i++) c[i]+=c[i-1];
for(int i=n;i;i--) sa[c[x[i]]--]=i;
for(int k=1;k<=n;k<<=1){
int num=0;
for(int i=n-k+1;i<=n;i++) y[++num]=i;
for(int i=1;i<=n;i++)
if(sa[i]>k) y[++num]=sa[i]-k;
for(int i=1;i<=m;i++) c[i]=0;
for(int i=1;i<=n;i++) c[x[y[i]]]++;
for(int i=1;i<=m;i++) c[i]+=c[i-1];
for(int i=n;i;i--) sa[c[x[y[i]]]--]=y[i],y[i]=0;
swap(x,y);
x[sa[1]]=num=1;
for(int i=2;i<=n;i++)
x[sa[i]]=(y[sa[i]]==y[sa[i-1]]&&y[sa[i]+k]==y[sa[i-1]+k])?num:++num;
if(n==num) break;
m=num;
}
for(int i=1;i<=n;i++) rk[sa[i]]=i;
for(int i=1,k=0;i<=n;i++){
if(rk[i]==1) continue;
if(k) k--;
while(i+k<=n&&sa[rk[i]-1]+k<=n&&s[i+k]==s[sa[rk[i]-1]+k]) k++;
h[rk[i]]=k;
}
for(int i=1;i<=n;i++) st[i][0]=h[i];
for(int j=1;j<=lg[n];j++)
for(int i=1;i<=n;i++)
st[i][j]=min(st[i][j-1],st[i+(1<<j-1)][j-1]);
}
inline int lcp(int x,int y){
if(x==y) return n-x+1;
x=rk[x],y=rk[y];
if(x>y) swap(x,y);
x++;
int k=lg[y-x+1];
return min(st[x][k],st[y-(1<<k)+1][k]);
}
}
using SA::lcp;
long long ans;
void solve(){
scanf("%s",s+1),n=strlen(s+1),SA::get_sa();
for(int i=1;i<=n;++i){
for(int j=i+2;j<=n;++j)
++bu[min(j-i-1,lcp(i,j))];
for(int j=n;j;--j) bu[j-1]+=bu[j];
for(int j=1;j<i;++j)
if(lcp(j,i)>=i-j)
ans+=bu[i-j+1];
for(int j=0;j<=n;++j) bu[j]=0;
}
printf("%lld\n",ans),ans=0;
}
int main(){
for(int i=2;i<N;i++) SA::lg[i]=SA::lg[i>>1]+1;
scanf("%d",&T);
while(T--) solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 4424kb
input:
2 114514 0000000
output:
1 3
result:
ok 2 number(s): "1 3"
Test #2:
score: -100
Runtime Error
input:
11 79380 2483905227 37902399703986576270 39991723655814713848046032694137883815354365954917 5541883522667841718787744915558298207485830622522715211018760095628594390563630840464643840093757297 56530485554219245862513973750218715585679416120445975390556326891488719311495909340757506478400624741858999...