Submission #1258341

#	Time	Username	Problem	Language	Result	Execution time	Memory
1258341		erering	Boxes with souvenirs (IOI15_boxes)	C++20	100 / 100	461 ms	196108 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
using namespace std;
#define ll long long
#define pb push_back
const int MAXN=1e7+5;
long long pref[MAXN],suff[MAXN];
long long delivery(int N, int K, int L, int p[]) {
    
    sort(p,p+N);
    for(int i=0;i<N;i++){
        if(i<K)pref[i]=p[i];
        else pref[i]=pref[i-K]+p[i-K]+p[i];
    }
    long long ans=pref[N-1]+min(p[N-1],L-p[N-1]);

    for(int i=N-1;i>=0;i--){
        if(i>=N-K)suff[i]=L-p[i];
        else suff[i]=suff[i+K]+L-p[i+K]+L-p[i];
        ans=min(ans,suff[i]+min(p[i],L-p[i])+(i>0?pref[i-1]+min(p[i-1],L-p[i-1]):0));
    }
    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