Submission #893050

#	Time	Username	Problem	Language	Result	Execution time	Memory
893050		Aiperiii	Bitaro's travel (JOI23_travel)	C++14	100 / 100	724 ms	7508 KiB

travel

#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
signed main(){
    int n;
    cin>>n;
    vector <int> a(n);
    for(int i=0;i<n;i++)cin>>a[i];
    int q;cin>>q;
    while(q--){
        int x;
        cin>>x;
        auto it=lower_bound(all(a),x);
        int l=it-a.begin(),r=it-a.begin();
        int ans=0;
        while(true){
            if(l==0){
                ans+=(a[n-1]-x);
                break;
            }
            else if(r==n){
                ans+=(x-a[0]);
                break;
            }
            else if(abs(a[l-1]-x)<=abs(a[r]-x)){
                auto it=lower_bound(all(a),x*2-a[r]);
                int pos=it-a.begin();
                ans+=abs(x-a[pos]);
                l=pos;
                x=a[pos];
            }
            else{
                auto it=lower_bound(all(a),x*2-a[l-1]);
                int pos=it-a.begin();
                r=pos;
                pos--;
                ans+=abs(x-a[pos]);
                x=a[pos];
            }
        }
        cout<<ans<<"\n";
        
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30
• Subtask 4: 55 / 55