Submission #993874

#	Time	Username	Problem	Language	Result	Execution time	Memory
993874		yellowtoad	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	480 ms	372564 KiB

boxes

#include "boxes.h"
#include <iostream>
using namespace std;
long long a[10000010], dp[10000010], dpp[10000010], minn = 1e18;
long long delivery(int n, int k, int l, int p[]) {
	for (int i = 1; i <= n; i++) a[i] = p[i-1];
	for (int i = 1; i <= n; i++) dp[i] = dp[max(0,i-k)]+a[i]*2;
	for (int i = n; i >= 1; i--) dpp[i] = dpp[min(n+1,i+k)]+(l-a[i])*2;
	for (int i = 0; i <= n; i++) minn = min(minn,dp[i]+dpp[i+1]);
	for (int i = 0; i <= n-k; i++) minn = min(minn,dp[i]+dpp[i+k+1]+l);
    return minn;
}

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