Submission #848231

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
848231	2023-09-11 17:40:54	bachhoangxuan	Longest Trip (IOI23_longesttrip)	C++17	100 / 100	11 ms	1236 KiB

longesttrip

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#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng;
const int maxn=305;
vector<int> cc[maxn];
vector<int> longest_trip(int N, int D)
{
    rng.seed(998244353);
    for(int i=0;i<N;i++) cc[i].clear();
    vector<int> res={0};
    vector<int> s;
    for(int i=1;i<N;i++){
        cc[i].push_back(i);
        s.push_back(i);
    }
    while(!s.empty()){
        int st=-1,cnt=0;
        bool check=false;
        shuffle(s.begin(),s.end(),rng);
        for(int x:s){
            cnt++;
            if(!are_connected({res.back()},cc[x])){
                if(st==-1) st=x;
                else for(int u:cc[x]) cc[st].push_back(u);
            }
            else{
                check=true;
                int l=1,r=(int)cc[x].size();
 
 
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• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 60 / 60