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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#413640 | #7901. Basic Substring Structure | grass8cow# | WA | 16ms | 32516kb | C++17 | 2.4kb | 2024-05-17 20:21:54 | 2024-05-17 20:21:55 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define ll long long
int lg[1010000];
int c[1001000],rk[1001000],t[1001000],tr[1001000],sa[1001000],n,h[1000100],f[1010000][20];
int lcp(int x,int y){
if(x>n||y>n)return 0;
x=rk[x],y=rk[y];if(x>y)swap(x,y);x++;
int k=lg[y-x+1];
return min(f[x][k],f[y-(1<<k)+1][k]);
}
void SA(){
int m=n;
for(int i=1;i<=n*4;i++)tr[i]=0;
for(int i=1;i<=m;i++)t[i]=0;
for(int i=1;i<=n;i++)t[rk[i]=c[i]]++;
for(int i=1;i<=m;i++)t[i]+=t[i-1];
for(int i=n;i;i--)sa[t[rk[i]]--]=i;
for(int k=1;;k<<=1){
int p=0;
for(int i=n-k+1;i<=n;i++)tr[++p]=i;
for(int i=1;i<=n;i++)if(sa[i]>k)tr[++p]=sa[i]-k;
for(int i=1;i<=m;i++)t[i]=0;
for(int i=1;i<=n;i++)t[rk[i]]++;
for(int i=1;i<=m;i++)t[i]+=t[i-1];
for(int i=n;i;i--)sa[t[rk[tr[i]]]--]=tr[i];
rk[sa[1]]=p=1;
for(int i=1;i<=n;i++)tr[i]=rk[i];
for(int i=2;i<=n;i++)
rk[sa[i]]=((tr[sa[i-1]]==tr[sa[i]]&&tr[sa[i-1]+k]==tr[sa[i]+k])?p:(++p));
m=p;if(m==n)break;
}
for(int i=1,k=0;i<=n;i++){
if(k)k--;
int j=sa[rk[i]-1];
while(i+k<=n&&j+k<=n&&c[i+k]==c[j+k])k++;
f[rk[i]][0]=k;
}
for(int j=1;j<20;j++)for(int i=1;i+(1<<j)-1<=n;i++)
f[i][j]=min(f[i][j-1],f[i+(1<<(j-1))][j-1]);
}
int sv(int x,int y,char cy){
int lc=1+min(lcp(x+1,y+1),y-x-1);
if(lc<y-x||y*2-x>n||cy!=c[y*2-x])return lc;
return lc+1+lcp(y+1,1+y+y-x);
}
#define long long
ll c1[200100],c2[200100];
void co(int l,int r){
c1[l]-=l,c1[r+1]+=l,c2[l]++,c2[r+1]--;
}
map<int,ll>gt[201000];
void sol(){
scanf("%d",&n);for(int i=1;i<=n;i++)scanf("%d",&c[i]),c1[i]=c2[i]=0;SA();
for(int i=2;i<=n;i++){
int l=lcp(1,i);
if(l+1<i){
c1[l+1]+=l,c1[i]-=l,c1[i+l]+=l;
co(1,l),co(i,i+l-1);
if(i+l>n)continue;
gt[i+l][c[l+1]]+=sv(l+1,i+l,c[l+1]),gt[l+1][c[i+l]]+=sv(l+1,i+l,c[i+l]);
}
else{
co(1,i-1),co(i,i+l-1),c1[i+l]+=l;
if(i+l>n)continue;
gt[i+l][c[l+1]]+=sv(l+1,i+l,c[l+1]);
}
}
ll ans=0;
for(int i=1;i<=n;i++){
c1[i]+=c1[i-1],c2[i]+=c2[i-1];
ll ve=c1[i]+c2[i]*i+n,mx=0;
for(auto it:gt[i])mx=max(mx,it.second);
ve+=mx;
ans+=(ve^i);
}
printf("%lld\n",ans);
}
int main(){
lg[0]=-1;
for(int i=1;i<=1000000;i++)lg[i]=lg[i>>1]+1;
int T;scanf("%d",&T);while(T--)sol();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 3ms
memory: 32516kb
input:
2 4 2 1 1 2 12 1 1 4 5 1 4 1 9 1 9 8 10
output:
15 217
result:
ok 2 lines
Test #2:
score: -100
Wrong Answer
time: 16ms
memory: 32516kb
input:
10000 8 2 1 2 1 1 1 2 2 9 2 2 1 2 1 2 1 2 1 15 2 1 2 1 1 1 1 2 2 1 2 1 2 2 1 2 1 1 10 2 1 1 1 2 2 1 1 2 2 3 2 1 2 11 1 2 2 1 1 2 1 2 2 1 1 14 2 1 1 1 1 2 1 1 1 2 2 1 2 1 12 2 2 2 1 2 2 2 1 1 2 1 2 4 2 1 1 2 8 1 2 2 2 1 2 1 1 8 1 1 2 1 2 1 1 1 6 2 1 1 1 2 2 14 2 2 1 1 1 1 2 2 2 1 2 2 1 1 10 1 2 2 1 1...
output:
94 147 423 47 279 80 370 436 393 155 278 306 223 522 391 118 590 677 666 643 169 238 435 328 203 435 305 609 229 367 357 500 459 475 666 605 327 381 750 433 591 308 352 484 784 946 893 993 931 843 959 1001 920 1034 362 1061 657 1049 389 692 615 871 1180 632 1202 844 1043 411 1056 1275 1096 534 962 4...
result:
wrong answer 2nd lines differ - expected: '128', found: '147'