Submission #1202072

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202072		alind	Boxes with souvenirs (IOI15_boxes)	C++20	10 / 100	0 ms	328 KiB

boxes

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

using namespace std;

typedef long long ll;

long long delivery(int N, int K, int L, int p[]) {
	vector<ll> pref(N), suf(N);
	for (int i = 0; i < N; i++) {
		pref[i] = p[i] + (i < K ? 0 : pref[i - K]);
		suf[N - 1 - i] = L - p[N - 1 - i] + (i < K ? 0 : suf[N - 1 - i + K]);
	}
	ll mn = 1ll<<62;
	for (int i = 0; i < N; i++) mn = min(mn, pref[i] + (i < N - 1 ? suf[i+1] : 0));
	for (int i = 0; i + K <= N; i++) mn = min(mn, L + (i ? pref[i-1] : 0) + (i + K < N ? suf[i + K] : 0));
	return mn * 2;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30