Submission #1084899

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084899		the_coding_pooh	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	708 ms	326032 KiB

boxes

#include "boxes.h"

#include <bits/stdc++.h>
#define uwu return ans;

using namespace std;

const int SIZE = 1e7 + 5;

const long long INF = 1e18;

long long dp[SIZE];

#define fs first
#define sc second

long long delivery(int N, int K, int L, int p[]) {
	long long ans = INF;

	vector <long long> pos;
	pos.push_back(0);
	for(int i = 0; i < N; i++){
		pos.push_back(p[i]);
	}
	pos.push_back(0);

	deque <pair<long long,  long long>> with_p, no_p;
	with_p.push_back({min((long long)L, 2 * (L - pos[1])), 0});
	no_p.push_back({0, 0});
	for(int i = 1; i <= N; i++){
		while(with_p.front().sc < i - K){
			with_p.pop_front();
		}
		while(no_p.front().sc < i - K){
			no_p.pop_front();
		}
		dp[i] = min(with_p.front().fs, no_p.front().fs + 2 * pos[i]);
		long long now_p = min((long long)L, 2 * (L - pos[i + 1]));
		while(!with_p.empty() && with_p.back().fs > dp[i] + now_p){
			with_p.pop_back();
		}
		with_p.push_back({dp[i] + now_p, i});
		while(!no_p.empty() && no_p.back().fs > dp[i]){
			no_p.pop_back();
		}
		no_p.push_back({dp[i], i});
	}
	ans = dp[N];
	uwu
}

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