Submission #307390

#	Time	Username	Problem	Language	Result	Execution time	Memory
307390		juggernaut	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	821 ms	294008 KiB

boxes

#include"boxes.h"
#include<bits/stdc++.h>
typedef long long int ll;
using namespace std;
ll pref[10000005],suf[10000005],ans,i;
ll delivery(int n,int k,int l,int a[]){
    sort(a,a+n);
    for(i=0;i<n;i++)pref[i]=(i<k?0:pref[i-k])+min(a[i]<<1ll,l);
    for(;i--;)suf[i]=(i<n-k?suf[i+k]:0)+min((l-a[i])<<1ll,l);
    ans=suf[0];
    for(i=0;i<n;i++)ans=min(ans,pref[i]+suf[i+1]);
    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