Submission #971972

#	Time	Username	Problem	Language	Result	Execution time	Memory
971972		thinknoexit	Longest Trip (IOI23_longesttrip)	C++17	30 / 100	10 ms	608 KiB

longesttrip

#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
using ll = long long;
int n;
vector<int> longest_trip(int N, int D) {
    n = N;
    vector<int> p1, p2;
    p1.push_back(0);
    for (int i = 1;i < n;i++) {
        if (p2.empty()) {
            if (are_connected({ p1.back() }, { i })) p1.push_back(i);
            else p2.push_back(i);
        }
        else {
            if (are_connected({ p1.back() }, { p2.back(), i })) {
                p1.push_back(i);
                if (are_connected({ p1.back() }, { p2.back() })) {
                    reverse(p2.begin(), p2.end());
                    for (auto& x : p2) p1.push_back(x);
                    p2.clear();
                }
            }
            else {
                p2.push_back(i);
            }
        }
    }
    if (p1.size() > p2.size()) return p1;
    return p2;
}

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