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Submission #1096803

# Submission time Handle Problem Language Result Execution time Memory
1096803 2024-10-05T07:31:44 Z tosivanmak Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 702 ms 77216 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long


struct qry{
    ll t,i,qid;
    bool operator<(const qry& qr)const{
        if(t!=qr.t)return t<qr.t;
        if(i!=qr.i)return i<qr.i;
        return qid<qr.qid;
    }
};
struct SEG{
  vector<pair<ll,ll> >seg;
    vector<ll>cnt;
    ll _n;
    void init(ll n){
        _n=n;
        seg.resize(4*n+5);
        cnt.resize(4*n+5,0);
    }
    void upd(ll ul, ll l, ll r, pair<ll,ll>val, ll id){
        if(l==r){
            seg[id]=val;
            cnt[id]=val.second-val.first+1;
            return;
        }
        ll mid=(l+r)>>1;
        if(ul<=mid) upd(ul,l,mid,val,id*2);
        else upd(ul,mid+1,r,val,id*2+1);
        cnt[id]=cnt[id*2]+cnt[id*2+1];
    }
    ll bs(ll l, ll r, ll k, ll id){
        if(l==r) return l;
        ll mid=(l+r)>>1;
        if(cnt[id*2]>=k) return bs(l,mid,k,id*2);
        else return bs(mid+1,r,k-cnt[id*2],id*2+1);
    }
    pair<ll,ll> pairfinding(ll ul, ll l, ll r, ll id){
        if(l==r){
            return seg[id];
        }
        else{
            ll mid=(l+r)>>1;
            if(ul<=mid){
                return pairfinding(ul,l,mid,id*2);
            }
            else return pairfinding(ul,mid+1,r,id*2+1);
        }
    }
    ll sum(ll ql, ll qr, ll l, ll r, ll id){
        if(l>qr||r<ql)return 0;
        if(l>=ql&&r<=qr)return cnt[id];
        ll mid=(l+r)>>1;
        return sum(ql,qr,l,mid,id*2)+sum(ql,qr,mid+1,r,id*2+1);
    }
    ll find(){
        return bs(1,_n,_n/2+1,1);
    }
}st;
ll n;
ll nxt[200005];
ll a[200005];
void start_shuffle(){
   ll cur=st.find();
    ll tot=st.sum(1,cur,1,n,1);
    pair<ll,ll>rng=st.pairfinding(cur,1,n,1);
    ll rngsum=rng.second-rng.first+1;
    if(tot-rngsum==n/2) return;
    tot-=rngsum;
    ll diff=n/2-tot;
    pair<ll,ll>bruh={rng.first,rng.first+diff-1};
    st.upd(cur,1,n,bruh,1);
    ll curid=bruh.second+1;
    while(1){
        if(nxt[curid]>rng.second){
            st.upd(a[curid],1,n,{curid,rng.second},1);break;
        }
        else{
            st.upd(a[curid],1,n,{curid,nxt[curid]-1},1);
            curid=nxt[curid];
        }
    }
}
ll find_id(ll idd){
    ll cur=st.bs(1,n,idd,1);
    pair<ll,ll>rng=st.pairfinding(cur,1,n,1);
    ll tot=st.sum(1,cur,1,n,1);
    ll rngsum=rng.second-rng.first+1;
    tot-=rngsum;
    return a[rng.first+idd-tot-1];
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll q;
    cin>>n>>q;
    st.init(n);
    for(int i=1;i<=n;i++)cin>>a[i];
    vector<qry>qrs;
    int cnt=1;
    while(q--){
        ll t,i;
        cin>>t>>i;
        t=min(t,n);
        qrs.push_back({t,i,cnt});
        cnt++;
    }
    sort(qrs.begin(),qrs.end());
    ll shuffles=0;
    ll ans[qrs.size()+5];
    ll newarr[n+5];
    newarr[0]=0;
    for(int i=1;i<=n;i++){
        newarr[i]=max(newarr[i-1],a[i]);
    }
    ll ptr=1;
    for(int i=1;i<=n;i++){
        if(newarr[i]!=newarr[i-1]){
            st.upd(newarr[i-1],1,n,{ptr,i-1},1);
            ptr=i;
        }
    }
    st.upd(newarr[n],1,n,{ptr,n},1);

    stack<pair<ll,ll> >s;
    for(int i=1;i<=n;i++){
        while(s.size()){
            if(a[i]>s.top().second){
               nxt[s.top().first]=i; s.pop(); 
            }
            else break;
        }
        s.push({i,a[i]});
    }
    while(s.size()){
        nxt[s.top().first]=300000;
        s.pop();
    }
    for(int i=0;i<qrs.size();i++){
        while(shuffles<qrs[i].t){
            shuffles++;
            start_shuffle();
        }
        ans[qrs[i].qid]=find_id(qrs[i].i);
    }
    for(int i=1;i<=cnt-1;i++){
        cout<<ans[i]<<'\n';
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:141:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<qry>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  141 |     for(int i=0;i<qrs.size();i++){
      |                 ~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 35716 KB Output is correct
2 Correct 311 ms 35716 KB Output is correct
3 Correct 313 ms 34440 KB Output is correct
4 Correct 287 ms 34180 KB Output is correct
5 Correct 292 ms 35716 KB Output is correct
6 Correct 291 ms 34308 KB Output is correct
7 Correct 295 ms 35656 KB Output is correct
8 Correct 304 ms 34440 KB Output is correct
9 Correct 279 ms 33960 KB Output is correct
10 Correct 327 ms 34636 KB Output is correct
11 Correct 290 ms 34460 KB Output is correct
12 Correct 296 ms 34128 KB Output is correct
13 Correct 296 ms 34948 KB Output is correct
14 Correct 297 ms 35208 KB Output is correct
15 Correct 315 ms 35728 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 309 ms 34696 KB Output is correct
18 Correct 263 ms 34280 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 600 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 375 ms 63372 KB Output is correct
2 Correct 361 ms 75864 KB Output is correct
3 Correct 299 ms 64904 KB Output is correct
4 Correct 304 ms 63628 KB Output is correct
5 Correct 309 ms 65160 KB Output is correct
6 Correct 287 ms 62740 KB Output is correct
7 Correct 330 ms 74848 KB Output is correct
8 Correct 301 ms 71584 KB Output is correct
9 Correct 290 ms 64648 KB Output is correct
10 Correct 293 ms 70540 KB Output is correct
11 Correct 267 ms 62868 KB Output is correct
12 Correct 323 ms 61836 KB Output is correct
13 Correct 389 ms 70096 KB Output is correct
14 Correct 301 ms 63880 KB Output is correct
15 Correct 356 ms 72328 KB Output is correct
16 Correct 24 ms 24920 KB Output is correct
17 Correct 360 ms 68384 KB Output is correct
18 Correct 253 ms 62808 KB Output is correct
19 Correct 79 ms 33708 KB Output is correct
20 Correct 98 ms 34484 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 16572 KB Output is correct
2 Correct 77 ms 17856 KB Output is correct
3 Correct 75 ms 17784 KB Output is correct
4 Correct 55 ms 17088 KB Output is correct
5 Correct 71 ms 17712 KB Output is correct
6 Correct 55 ms 16828 KB Output is correct
7 Correct 68 ms 17600 KB Output is correct
8 Correct 59 ms 16928 KB Output is correct
9 Correct 61 ms 17400 KB Output is correct
10 Correct 52 ms 16828 KB Output is correct
11 Correct 69 ms 17256 KB Output is correct
12 Correct 56 ms 16836 KB Output is correct
13 Correct 55 ms 16936 KB Output is correct
14 Correct 53 ms 17348 KB Output is correct
15 Correct 53 ms 17052 KB Output is correct
16 Correct 12 ms 12636 KB Output is correct
17 Correct 55 ms 16724 KB Output is correct
18 Correct 41 ms 18144 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 35716 KB Output is correct
2 Correct 311 ms 35716 KB Output is correct
3 Correct 313 ms 34440 KB Output is correct
4 Correct 287 ms 34180 KB Output is correct
5 Correct 292 ms 35716 KB Output is correct
6 Correct 291 ms 34308 KB Output is correct
7 Correct 295 ms 35656 KB Output is correct
8 Correct 304 ms 34440 KB Output is correct
9 Correct 279 ms 33960 KB Output is correct
10 Correct 327 ms 34636 KB Output is correct
11 Correct 290 ms 34460 KB Output is correct
12 Correct 296 ms 34128 KB Output is correct
13 Correct 296 ms 34948 KB Output is correct
14 Correct 297 ms 35208 KB Output is correct
15 Correct 315 ms 35728 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 309 ms 34696 KB Output is correct
18 Correct 263 ms 34280 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 600 KB Output is correct
21 Correct 375 ms 63372 KB Output is correct
22 Correct 361 ms 75864 KB Output is correct
23 Correct 299 ms 64904 KB Output is correct
24 Correct 304 ms 63628 KB Output is correct
25 Correct 309 ms 65160 KB Output is correct
26 Correct 287 ms 62740 KB Output is correct
27 Correct 330 ms 74848 KB Output is correct
28 Correct 301 ms 71584 KB Output is correct
29 Correct 290 ms 64648 KB Output is correct
30 Correct 293 ms 70540 KB Output is correct
31 Correct 267 ms 62868 KB Output is correct
32 Correct 323 ms 61836 KB Output is correct
33 Correct 389 ms 70096 KB Output is correct
34 Correct 301 ms 63880 KB Output is correct
35 Correct 356 ms 72328 KB Output is correct
36 Correct 24 ms 24920 KB Output is correct
37 Correct 360 ms 68384 KB Output is correct
38 Correct 253 ms 62808 KB Output is correct
39 Correct 79 ms 33708 KB Output is correct
40 Correct 98 ms 34484 KB Output is correct
41 Correct 75 ms 16572 KB Output is correct
42 Correct 77 ms 17856 KB Output is correct
43 Correct 75 ms 17784 KB Output is correct
44 Correct 55 ms 17088 KB Output is correct
45 Correct 71 ms 17712 KB Output is correct
46 Correct 55 ms 16828 KB Output is correct
47 Correct 68 ms 17600 KB Output is correct
48 Correct 59 ms 16928 KB Output is correct
49 Correct 61 ms 17400 KB Output is correct
50 Correct 52 ms 16828 KB Output is correct
51 Correct 69 ms 17256 KB Output is correct
52 Correct 56 ms 16836 KB Output is correct
53 Correct 55 ms 16936 KB Output is correct
54 Correct 53 ms 17348 KB Output is correct
55 Correct 53 ms 17052 KB Output is correct
56 Correct 12 ms 12636 KB Output is correct
57 Correct 55 ms 16724 KB Output is correct
58 Correct 41 ms 18144 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 598 ms 77216 KB Output is correct
62 Correct 702 ms 75960 KB Output is correct
63 Correct 589 ms 73900 KB Output is correct
64 Correct 450 ms 72224 KB Output is correct
65 Correct 488 ms 74844 KB Output is correct
66 Correct 449 ms 71720 KB Output is correct
67 Correct 444 ms 74304 KB Output is correct
68 Correct 453 ms 71580 KB Output is correct
69 Correct 525 ms 72312 KB Output is correct
70 Correct 434 ms 71264 KB Output is correct
71 Correct 406 ms 70996 KB Output is correct
72 Correct 430 ms 70660 KB Output is correct
73 Correct 445 ms 70980 KB Output is correct
74 Correct 451 ms 72744 KB Output is correct
75 Correct 464 ms 72840 KB Output is correct
76 Correct 24 ms 24912 KB Output is correct
77 Correct 409 ms 68752 KB Output is correct
78 Correct 325 ms 71668 KB Output is correct
79 Correct 0 ms 464 KB Output is correct
80 Correct 0 ms 348 KB Output is correct