Submission #957445

#	Time	Username	Problem	Language	Result	Execution time	Memory
957445		Turkhuu	Longest Trip (IOI23_longesttrip)	C++17	40 / 100	10 ms	852 KiB

longesttrip

#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> longest_trip(int N, int D) {
    if (D > 1) {
        deque<int> a;
        if (are_connected({0}, {1})) {
            a = {0, 1};
            if (are_connected({0}, {2})) {
                a.push_front(2);
            } else {
                a.push_back(2);
            }
        } else {
            a = {0, 2, 1};
        }
        for (int i = 3; i < N; i++) {
            if (are_connected({a.front()}, {i})) {
                a.push_front(i);
            } else {
                a.push_back(i);
            }
        }
        return vector(a.begin(), a.end());
    }
    vector<int> a{0}, b{1};
    for (int i = 2; i < N; i++) {
        if (are_connected({i}, {a.back()})) {
            a.push_back(i);
        } else if (are_connected({i}, {b.back()})) {
            b.push_back(i);
        } else {
            a.insert(a.end(), b.rbegin(), b.rend());
            b = {i};
        }
    }
    return a.size() > b.size() ? a : b;
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 0 / 60