Submission #807427

#	Time	Username	Problem	Language	Result	Execution time	Memory
807427		oscar1f	Triple Jump (JOI19_jumps)	C++17	32 / 100	4048 ms	10756 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,rep;
int val[MAX_VAL];
int maxi[MAX_VAL];
vector<int> enCours;
vector<pair<int,int>> paireInter;

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);
    }
    /*for (auto i:paireInter) {
        cout<<i.first<<" "<<i.second<<endl;
    }
    cout<<endl;*/
    cin>>nbReq;
    for (int ireq=1;ireq<=nbReq;ireq++) {
        cin>>debReq>>finReq;
        maxi[finReq+1]=0;
        for (int i=finReq;i>=debReq;i--) {
            maxi[i]=max(maxi[i+1],val[i]);
        }
        rep=0;
        for (auto i:paireInter) {
            if (i.first>=debReq and 2*i.second-i.first<=finReq) {
                //cout<<i.first<<" "<<i.second<<endl;
                rep=max(rep,val[i.first]+val[i.second]+maxi[2*i.second-i.first]);
            }
        }
        cout<<rep<<"\n";
    }
}

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