Submission #484746

#	Time	Username	Problem	Language	Result	Execution time	Memory
484746		imachug	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	571 ms	293508 KiB

boxes

#include "boxes.h"

#include <bits/stdc++.h>

using namespace std;


long long delivery(int n, int k, int l, int p[]) {
	vector<long long> dp_left(n + 1, 1e18);
	dp_left[0] = 0;
	for(int i = 1; i <= n; i++) {
		dp_left[i] = dp_left[max(0, i - k)] + 2 * p[i - 1];
	}

	vector<long long> dp_right(n + 1, 1e18);
	dp_right[n] = 0;
	for(int i = n - 1; i >= 0; i--) {
		dp_right[i] = dp_right[min(n, i + k)] + 2 * (l - p[i]);
	}

	long long ans = 1e18;
	for(int i = 0; i <= n; i++) {
		ans = min(ans, dp_left[i] + dp_right[i]);
		ans = min(ans, dp_left[i] + dp_right[min(n, i + k)] + l);
	}

	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