Submission #28759

#	Time	Username	Problem	Language	Result	Execution time	Memory
28759		noobprogrammer	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	529 ms	196064 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h> 
using namespace std ;
#define ii pair<int,int>
#define fi first
#define se second
#define vi vector<int>
#define vii vector<ii>
typedef long long ll ;

ll pre[10000010] , suf[10000010] ;

long long delivery(int n, int k, int L , int arr[]) {
	ll l = L ;
	for(int i=0;i<n;i++){
		if(i < k) pre[i] = 2LL*arr[i] ;
		else pre[i] = 2LL*arr[i] + pre[i-k] ;
	}
	for(int i=n-1; i >= 0 ;i--){
		if(n - i - 1 < k) suf[i] = 2LL*(l - arr[i]) ;
		else suf[i] = suf[i+k] + 2LL* (l - arr[i]) ;
	}
	ll res = l + suf[k] ;
	for(int i = k ; i<n ; i++) res = min(res , pre[i-k] + l + suf[i+1]) ;
	res = min(res , suf[0]) ;
	for(int i=0;i<n;i++) res = min(res , pre[i] + suf[i+1]) ;
	return res ;
}

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