Submission #393219

#	Time	Username	Problem	Language	Result	Execution time	Memory
393219		peuch	Boxes with souvenirs (IOI15_boxes)	C++17	0 / 100	1 ms	332 KiB

boxes

#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 1e7 + 10;

long long l[MAXN], r[MAXN];

long long delivery(int N, int K, int L, int p[]) {
	long long n = N;
	long long k = K;
	for(int i = 0; i < N; i++){
		l[i] = p[i];
		if(i >= k) l[i] += l[i - k];
	}
	for(int i = N - 1; i >= 0; i--){
		r[i] = (L - p[i]);
		if(i + k < N) r[i] += r[i + k];
	}
	long long ans = n * L;
	for(int i = 0; i < N - 1; i++) ans = min(ans, 2 * l[i] + 2 * r[i + 1]);
	ans = min(ans, L + 2 * r[k]);
	ans = min(ans, L + 2 * l[N - k - 1]);
	for(int i = 1; i + k < N; i++) ans = min(ans, 2 * l[i - 1] + L + 2 * r[i + k]);
	return ans;
}

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