Submission #1203696

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203696		madamadam3	Game (APIO22_game)	C++20	0 / 100	0 ms	320 KiB

game

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

using namespace std;

int n, k;
vector<vector<int>> adj;
bool has_cycle = false; // avoid re-computing answer if its already true

bool dfs(int u, set<int> &vis, int head) {
    bool does = false;
    vis.insert(u);

    for (auto &v : adj[u]) {
        if (v <= head && head < k) return true;
        if (vis.count(v)) continue;
        does = does || dfs(v, vis, head);
        if (does) break;
    }

    return does;
}

bool check() {
    for (int i = 0; i < k; i++) {
        set<int> vis;
        if (dfs(i, vis, i)) return true;
    }
    return false;
}

void init(int N, int K) {
    n = N; k = K;
    adj.assign(n, vector<int>());
    for (int i = 1; i < k; i++) {
        adj[i - 1].push_back(i);
    }
}

int add_teleporter(int u, int v) {
    adj[u].push_back(v);
    if (!has_cycle) has_cycle = has_cycle || check();
    return has_cycle;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40