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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#638912#7036. Can You Solve the Harder Problem?Mu_SilkWA 731ms43068kbC++203.1kb2024-10-13 17:18:052024-10-13 17:18:05

Judging History

This is the latest submission verdict.

  • [2024-10-13 17:18:05]
  • Judged
  • Verdict: WA
  • Time: 731ms
  • Memory: 43068kb
  • [2024-10-13 17:18:05]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int N=2e5+5;

int n,m;
ll a[N],s[N];

vector<int> sa,rk;
vector<vector<int>> minn;

vector<int> h;//h[i]=lcp(sa[i],sa[i-1]);

//s下标从1开始
void init(){
    
    vector<int> cnt(max(n+1,m+1)),oldrk(2*n+1),id(n+1),key(n+1);
    sa.resize(n+1);rk.resize(n+1);
    
    auto cmp=[&](int x,int y,int w){
        return oldrk[x]==oldrk[y]&&oldrk[x+w]==oldrk[y+w];
    };

    for(int i=1;i<=n;i++)++cnt[rk[i]=s[i]];
    for(int i=1;i<=m;i++)cnt[i]+=cnt[i-1];
    for(int i=n;i>=1;i--)sa[cnt[rk[i]]--]=i;

    for(ll w=1;;w<<=1){
        int p=0;
        for(int i=n;i>n-w;i--)id[++p]=i;
        for(int i=1;i<=n;i++)if(sa[i]>w)id[++p]=sa[i]-w;
        fill(cnt.begin(),cnt.end(),0);
        for(int i=1;i<=n;i++)++cnt[key[i]=rk[id[i]]];

        for(int i=1;i<=m;i++)cnt[i]+=cnt[i-1];
        for(int i=n;i>=1;i--)sa[cnt[key[i]]--]=id[i];
        copy(rk.begin()+1,rk.end(),oldrk.begin()+1);
        p=0;
        for(int i=1;i<=n;i++)rk[sa[i]]=cmp(sa[i],sa[i-1],w)?p:++p;
        if(p==n)break;
        m=p;
    }

    for(int i=1,k=0;i<=n;i++){
        if(rk[i]==0)continue;
        if(k)--k;
        while(s[i+k]==s[sa[rk[i]-1]+k])++k;
        h[rk[i]]=k;
    }

    minn.resize(n+1);
    int t=log2(n)+2;
    for(int i=1;i<=n;i++){
        minn[i].resize(t);
        minn[i][0]=h[i];
        // cout<<h[i]<<" ";
    }
    // cout<<"\n";
    for(int i=1;(1<<i)<=n;i++){
        for(int j=1;j+(1<<i)-1<=n;j++){
            minn[j][i]=min(minn[j][i-1],minn[j+(1<<(i-1))][i-1]);
        }
    }
}


array<ll,3> sta[N];
int top;
ll sum[N];
ll ans;



void solve(){
    cin>>n;
    m=0;
    h.resize(n+1);
    for(int i=1;i<=n;i++) h[i]=0;

    vector<int> tmp;

    m=0;
    for(int i=1;i<=n;i++){
        cin>>s[i];
        tmp.push_back(s[i]);
        a[i]=s[i];
    }
    ans=top=0;

    tmp.erase(unique(tmp.begin(),tmp.end()),tmp.end());
    for(int i=1;i<=n;i++){
        s[i]=lower_bound(tmp.begin(),tmp.end(),s[i])-tmp.begin()+1;
    }
    m=tmp.size()+1;

    init();

    for(int i=n;i>=1;i--){
        while(top&&a[i]>sta[top][0]){
            top--;
        }
        ll val=n-i+1;
        if(top) val=sta[top][1]-i;
        array<ll,3> arr;
        arr[0]=a[i],arr[1]=i,arr[2]=val;
        sta[++top]=arr;
        sum[top]=sum[top-1]+1ll*a[i]*val;

        int len=h[i];

        int l=1,r=top,mid,pos=-1;
        while(l<=r){
            mid=(l+r)>>1;
            if(sta[mid][1]-i+1>len){
                pos=mid;
                l=mid+1;
            }else r=mid-1;
        }

        if(pos==-1){
            continue;
        }
        // cout<<"# "<<i<<" "<<pos<<" "<<len<<"\n";
        // for(int i=1;i<=top;i++) cout<<"@ "<<i<<" "<<sta[i][0]<<" "<<sta[i][1]<<" "<<sta[i][2]<<"\n";

        ans+=sum[pos];
        ans+=1ll*sta[pos+1][2]*((sta[pos][1]-1-i+1)-len);

        // cout<<ans<<"\n";

    }

    cout<<ans<<"\n";
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n=1;
    cin>>n;
    while(n--)solve();
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 7760kb

input:

2
3
1 2 3
3
2 3 3

output:

14
14

result:

ok 2 lines

Test #2:

score: -100
Wrong Answer
time: 731ms
memory: 43068kb

input:

1000
407
205460 200518 200561 199235 198814 198136 198802 206763 198795 200705 205862 209366 204017 209481 206300 198499 197364 200897 208928 196983 205605 206396 205140 201050 199886 207314 196947 207905 204999 203288 200298 198594 198286 197714 206506 203962 197628 201127 206380 199090 200711 2063...

output:

16365610905
474745665925
1244923404
459131922871
475547993476
297466129327
475097824749
481546930319
471869168227
472711775606
32304453885
220316078378
480234079135
486362216474
474153803099
472914280337
331035897039
476271954229
482095465913
9309886515
481632636781
116591680674
474892737558
4553142...

result:

wrong answer 1st lines differ - expected: '17377263880', found: '16365610905'