Submission #319473

#	Time	Username	Problem	Language	Result	Execution time	Memory
319473		VEGAnn	Fun Tour (APIO20_fun)	C++14	26 / 100	15 ms	2924 KiB

fun

#include "fun.h"
#include <bits/stdc++.h>
#define PB push_back
#define sz(x) ((int)x.size())
#define i2 array<int,2>
#define all(x) x.begin(),x.end()
using namespace std;
const int N = 100100;
vector<int> g[N], ans;
int siz[N], glob, mx;
bool mrk[N];

void dfs(int v, int p, int len){
    if (mx < len){
        mx = len;
        glob = v;
    }

    for (int u : g[v]){
        if (u == p || mrk[u]) continue;

        dfs(u, v, len + 1);
    }
}

vector<int> createFunTour(int n, int Q) {
    if (n <= 500){
        for (int i = 0; i < n; i++)
        for (int j = i + 1; j < n; j++){
            int now = hoursRequired(i, j);

            if (now == 1){
                g[i].PB(j);
                g[j].PB(i);
            }
        }
    } else {
//        for (int i = 1; i < n; i++){
//            int j = (i - 1) / 2;
//
//            g[i].PB(j);
//            g[j].PB(i);
//        }
        exit(-1);
    }

    ans.clear();

    mx = -1;

    dfs(0, -1, 0);

    for (int it = 0; it < n; it++){
        ans.PB(glob);
        mrk[glob] = 1;

        mx = -1;

        dfs(glob, -1, 0);
    }

    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 34