Submission #1109806

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109806		raspy	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	538 ms	291776 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

ll dp[10000005];
ll dp1[10000005];

long long delivery(int n, int k, int l, int p[])
{
	for (int i = 1; i <= n; i++)
	{
		if (i >= k) dp[i] = dp[i-k]+2ll*(p[i-1]);
		else dp[i] = 2ll*(p[i-1]);
	}
	for (int i = 1; i <= n; i++)
	{
		if (i >= k) dp1[i] = dp1[i-k]+2ll*(l-p[n-i]);
		else dp1[i] = 2ll*(l-p[n-i]);
	}
	ll rez = dp[n];
	for (int i = 0; i <= n; i++)
	{
		rez = min(rez, dp[i]+dp1[n-i]);
		if (n-i-k >= 0)
			rez = min(rez, dp[i]+dp1[n-i-k]+l);
	}
	return rez;
}

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