Submission #846613

#	Time	Username	Problem	Language	Result	Execution time	Memory
846613		ttamx	Longest Trip (IOI23_longesttrip)	C++17	15 / 100	6 ms	600 KiB

longesttrip

#include "longesttrip.h"
#include<bits/stdc++.h>

using namespace std;

vector<int> longest_trip(int N, int D)
{
    if(D==3){
        vector<int> ans(N);
        iota(ans.begin(),ans.end(),0);
        return ans;
    }
    if(D==2){
        deque<int> path;
        for(int i=0;i<3;i++)path.emplace_back(i);
        for(int i=1;i<3;i++){
            if(!are_connected({i-1},{i})){
                swap(path[0],path[i-1]);
                swap(path[2],path[i]);
                break;
            }
        }
        for(int i=3;i<N;i++){
            if(are_connected({i},{path[0]})){
                path.emplace_front(i);
            }else{
                path.emplace_back(i);
            }
        }
        vector<int> ans;
        for(auto x:path)ans.emplace_back(x);
        return ans;
    }
    return {};
}

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