Submission #808648

#	Time	Username	Problem	Language	Result	Execution time	Memory
808648		oscar1f	Triple Jump (JOI19_jumps)	C++17	27 / 100	42 ms	10244 KiB

jumps

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

#define int long long

const int MAX_VAL=500*1000+5,INFINI=1000*1000*1000;
int nbVal,nbReq,debReq,finReq,idReq,posRep,debInter,midInter,ancPos;
int val[MAX_VAL];
int maxi[MAX_VAL];
int rep[MAX_VAL];
vector<int> enCours;
vector<pair<int,int>> paireInter;
vector<tuple<int,int,int>> listeReq;

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>nbVal;
    for (int i=1;i<=nbVal;i++) {
        cin>>val[i];
    }
    enCours.push_back(1);
    for (int i=2;i<=nbVal;i++) {
        while (!enCours.empty() and val[enCours.back()]<=val[i]) {
            if (nbVal-i>=i-enCours.back()) {
                paireInter.push_back({enCours.back(),i});
            }
            enCours.pop_back();
        } 
        if (!enCours.empty()) {
            if (nbVal-i>=i-enCours.back()) {
                paireInter.push_back({enCours.back(),i});
            }
        }
        enCours.push_back(i);
    }
    sort(paireInter.begin(),paireInter.end());
    /*for (auto i:paireInter) {
        cout<<i.first<<" "<<i.second<<endl;
    }
    cout<<endl;*/
    cin>>nbReq;
    for (int ireq=1;ireq<=nbReq;ireq++) {
        cin>>debReq>>finReq;
        listeReq.push_back(make_tuple(debReq,finReq,ireq));
    }
    sort(listeReq.begin(),listeReq.end());
    for (auto r:listeReq) {
        debReq=get<0>(r);
        finReq=get<1>(r);
        idReq=get<2>(r);
        maxi[finReq+1]=0;
        for (int i=finReq;i>=debReq;i--) {
            maxi[i]=max(maxi[i+1],val[i]);
        }
        for (int i=0;i<(int)paireInter.size();i++) {
            debInter=paireInter[i].first;
            midInter=paireInter[i].second;
            if (debInter>=debReq and 2*midInter-debInter<=finReq and rep[idReq]<val[debInter]+val[midInter]+maxi[2*midInter-debInter]) {
                rep[idReq]=val[debInter]+val[midInter]+maxi[2*midInter-debInter];
                posRep=i;
            }
        }
        if (posRep<ancPos) {
            exit(1);
        } 
        ancPos=posRep;
        //cout<<posRep<<" ";
    }
    //cout<<endl;
    for (int ireq=1;ireq<=nbReq;ireq++) {
        cout<<rep[ireq]<<"\n";
    }
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 27 / 27
• Subtask 4: 0 / 54