oj.uz

답안 #808737

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
808737 2023-08-05T10:19:03 Z oscar1f 3단 점프 (JOI19_jumps) C++17
100 / 100
 677 ms 114100 KB 
#include<bits/stdc++.h>
using namespace std;

#define int long long

const int MAX_VAL=500*1000+5,INFINI=1000*1000*1000,DECA=(1<<19);


struct noeud {
    int maxDF=-INFINI,maxD=-INFINI,maxF=-INFINI;
};

noeud prod(noeud a,noeud b) {
    return {max(max(a.maxDF,b.maxDF),a.maxD+b.maxF),max(a.maxD,b.maxD),max(a.maxF,b.maxF)};
}

struct segtree {
    vector<noeud> tree;
    int n;
    segtree(int _n) {
        n=_n;
        tree.resize(2*n);
    }
    void modif(int pos,noeud nouvVal) {
        pos+=n;
        tree[pos]=nouvVal;
        while (pos>1) {
            pos/=2;
            tree[pos]=prod(tree[2*pos],tree[2*pos+1]);
        }
    }
    void ajout(int pos,noeud nouvVal) {
        modif(pos,prod(nouvVal,tree[pos+n]));
    }

    noeud calcMax(int deb,int fin) {
        noeud repDeb,repFin;
        deb+=n;
        fin+=n;
        while (deb<=fin) {
            if (deb%2==1) {
                repDeb=prod(repDeb,tree[deb]);
                deb++;
            }
            if (fin%2==0) {
                repFin=prod(tree[fin],repFin);
                fin--;
            }
            deb/=2;
            fin/=2;
        }
        return prod(repDeb,repFin);
    }
};

int nbVal,nbReq,debReq,finReq;
int val[MAX_VAL];
int rep[MAX_VAL];
segtree arbreMax(DECA); 
vector<pair<int,int>> interCommence[MAX_VAL];
vector<int> enCours;
vector<pair<int,int>> listeReq[MAX_VAL];

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>nbVal;
    for (int i=0;i<nbVal;i++) {
        cin>>val[i];
    }
    enCours.push_back(0);
    for (int i=1;i<nbVal;i++) {
        while (!enCours.empty() and val[enCours.back()]<=val[i]) {
            if (nbVal-i>i-enCours.back()) {
                interCommence[enCours.back()].push_back({2*i-enCours.back(),val[i]+val[enCours.back()]});
                //cout<<enCours.back()<<" "<<2*i-enCours.back()<<" "<<val[i]+val[enCours.back()]<<endl;
            }
            enCours.pop_back();
        } 
        if (!enCours.empty()) {
            if (nbVal-i>i-enCours.back()) {
                interCommence[enCours.back()].push_back({2*i-enCours.back(),val[i]+val[enCours.back()]});
                //cout<<enCours.back()<<" "<<2*i-enCours.back()<<" "<<val[i]+val[enCours.back()]<<endl;
            }
        }
        enCours.push_back(i);
    }
    cin>>nbReq;
    for (int ireq=1;ireq<=nbReq;ireq++) {
        cin>>debReq>>finReq;
        listeReq[debReq-1].push_back({finReq-1,ireq});
    }
    for (int deb=nbVal-1;deb>=0;deb--) {
        arbreMax.ajout(deb,{-INFINI,-INFINI,val[deb]});
        for (auto i:interCommence[deb]) {
            arbreMax.ajout(i.first,{-INFINI,i.second,-INFINI});
        }
        for (auto i:listeReq[deb]) {
            rep[i.second]=arbreMax.calcMax(deb,i.first).maxDF;
        }
    }
    //cout<<endl;
    for (int ireq=1;ireq<=nbReq;ireq++) {
        cout<<rep[ireq]<<"\n";
    }
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48340 KB Output is correct
2 Correct 20 ms 48468 KB Output is correct
3 Correct 20 ms 48456 KB Output is correct
4 Correct 21 ms 48440 KB Output is correct
5 Correct 21 ms 48456 KB Output is correct
6 Correct 21 ms 48460 KB Output is correct
7 Correct 20 ms 48456 KB Output is correct
8 Correct 20 ms 48372 KB Output is correct
9 Correct 19 ms 48448 KB Output is correct
10 Correct 25 ms 48384 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48340 KB Output is correct
2 Correct 20 ms 48468 KB Output is correct
3 Correct 20 ms 48456 KB Output is correct
4 Correct 21 ms 48440 KB Output is correct
5 Correct 21 ms 48456 KB Output is correct
6 Correct 21 ms 48460 KB Output is correct
7 Correct 20 ms 48456 KB Output is correct
8 Correct 20 ms 48372 KB Output is correct
9 Correct 19 ms 48448 KB Output is correct
10 Correct 25 ms 48384 KB Output is correct
11 Correct 160 ms 75708 KB Output is correct
12 Correct 178 ms 75492 KB Output is correct
13 Correct 160 ms 75728 KB Output is correct
14 Correct 167 ms 75736 KB Output is correct
15 Correct 165 ms 75720 KB Output is correct
16 Correct 174 ms 75104 KB Output is correct
17 Correct 184 ms 75112 KB Output is correct
18 Correct 175 ms 74920 KB Output is correct
19 Correct 164 ms 75532 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 60272 KB Output is correct
2 Correct 74 ms 56236 KB Output is correct
3 Correct 82 ms 57812 KB Output is correct
4 Correct 122 ms 60236 KB Output is correct
5 Correct 110 ms 60224 KB Output is correct
6 Correct 108 ms 60256 KB Output is correct
7 Correct 104 ms 60236 KB Output is correct
8 Correct 114 ms 60284 KB Output is correct
9 Correct 103 ms 60240 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48340 KB Output is correct
2 Correct 20 ms 48468 KB Output is correct
3 Correct 20 ms 48456 KB Output is correct
4 Correct 21 ms 48440 KB Output is correct
5 Correct 21 ms 48456 KB Output is correct
6 Correct 21 ms 48460 KB Output is correct
7 Correct 20 ms 48456 KB Output is correct
8 Correct 20 ms 48372 KB Output is correct
9 Correct 19 ms 48448 KB Output is correct
10 Correct 25 ms 48384 KB Output is correct
11 Correct 160 ms 75708 KB Output is correct
12 Correct 178 ms 75492 KB Output is correct
13 Correct 160 ms 75728 KB Output is correct
14 Correct 167 ms 75736 KB Output is correct
15 Correct 165 ms 75720 KB Output is correct
16 Correct 174 ms 75104 KB Output is correct
17 Correct 184 ms 75112 KB Output is correct
18 Correct 175 ms 74920 KB Output is correct
19 Correct 164 ms 75532 KB Output is correct
20 Correct 107 ms 60272 KB Output is correct
21 Correct 74 ms 56236 KB Output is correct
22 Correct 82 ms 57812 KB Output is correct
23 Correct 122 ms 60236 KB Output is correct
24 Correct 110 ms 60224 KB Output is correct
25 Correct 108 ms 60256 KB Output is correct
26 Correct 104 ms 60236 KB Output is correct
27 Correct 114 ms 60284 KB Output is correct
28 Correct 103 ms 60240 KB Output is correct
29 Correct 606 ms 110980 KB Output is correct
30 Correct 506 ms 100832 KB Output is correct
31 Correct 501 ms 104760 KB Output is correct
32 Correct 677 ms 110972 KB Output is correct
33 Correct 660 ms 110968 KB Output is correct
34 Correct 560 ms 108700 KB Output is correct
35 Correct 599 ms 108364 KB Output is correct
36 Correct 669 ms 108408 KB Output is correct
37 Correct 582 ms 109788 KB Output is correct
38 Correct 405 ms 113608 KB Output is correct
39 Correct 412 ms 113636 KB Output is correct
40 Correct 411 ms 110236 KB Output is correct
41 Correct 398 ms 109684 KB Output is correct
42 Correct 390 ms 109728 KB Output is correct
43 Correct 391 ms 111424 KB Output is correct
44 Correct 428 ms 113876 KB Output is correct
45 Correct 414 ms 113876 KB Output is correct
46 Correct 425 ms 110700 KB Output is correct
47 Correct 411 ms 110396 KB Output is correct
48 Correct 450 ms 110244 KB Output is correct
49 Correct 423 ms 112244 KB Output is correct
50 Correct 495 ms 114100 KB Output is correct
51 Correct 462 ms 114056 KB Output is correct
52 Correct 452 ms 111556 KB Output is correct
53 Correct 455 ms 111308 KB Output is correct
54 Correct 460 ms 111312 KB Output is correct
55 Correct 448 ms 112892 KB Output is correct