Submission #949079

#	Time	Username	Problem	Language	Result	Execution time	Memory
949079		irmuun	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	540 ms	293976 KiB

boxes

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

ll delivery(int N,int K,int L,int pos[]){
    ll pre[N+5],suf[N+5],ans=1e18;
    suf[N]=0;
    for(int i=0;i<K;i++){
        pre[i]=pos[i];
    }
    for(int i=K;i<N;i++){
        pre[i]=pre[i-K]+pos[i];
    }
    for(int i=N-1;i>=N-K;i--){
        suf[i]=L-pos[i];
    }
    for(int i=N-K-1;i>=0;i--){
        suf[i]=suf[i+K]+(L-pos[i]);
    }
    ans=min(ans,suf[0]*2);
    for(int i=0;i<N;i++){
        ans=min(ans,pre[i]*2+suf[i+1]*2);
    }
    ans=min(ans,suf[K]*2+L);
    for(int i=K;i<=N;i++){
        ans=min(ans,pre[i-K]*2+suf[i+1]*2+L);
    }
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30