Submission #846937

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
846937	2023-09-08 17:24:05	arbuzick	Longest Trip (IOI23_longesttrip)	C++17	100 / 100	16 ms	856 KiB

longesttrip

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#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
vector<int> longest_trip(int n, int d) {
    mt19937 rnd(57);
    vector<int> ord(n);
    iota(ord.begin(), ord.end(), 0);
    shuffle(ord.begin(), ord.end(), rnd);
    vector<int> ans1, ans2;
    bool disconnected = false;
    for (int i = 0; i < n; ++i) {
        if (ans1.empty() || are_connected({ans1.back()}, {ord[i]})) {
            ans1.push_back(ord[i]);
            disconnected = false;
        } else if (disconnected) {
            ans2.push_back(ord[i]);
        } else if (ans2.empty() || are_connected({ans2.back()}, {ord[i]})) {
            ans2.push_back(ord[i]);
            disconnected = true;
        } else {
            if (i == n - 1) {
                reverse(ans2.begin(), ans2.end());
                for (auto vl : ans2) {
                    ans1.push_back(vl);
                }
                ans2 = {ord[i]};
            } else {
 
 
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• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 60 / 60