Submission #1064165

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064165		Ignut	Toy Train (IOI17_train)	C++17	22 / 100	790 ms	1628 KiB

train

// Ignut

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 5555;
int n, m;

vector<int> a, r;

vector<int> g[N];

bool ans = false;

int used[N];
bool good[N];

void dfs(int v) {
    used[v] = true;
    ans |= good[v];
    if (ans) return;
    for (int to : g[v])
        if (!used[to])
            dfs(to);
}

void dfs1(int v, int st) {
    if (good[st]) return;
    used[v] = true;
    for (int to : g[v]) {
        if (to == st) {
            good[st] = true; return;
        }
        if (!used[to]) dfs1(to, st);
    }
}

void dfs2(int v, int st) {
    if (good[st]) return;
    used[v] = true;
    for (int to : g[v]) {
        if (r[to] == 1) continue;
        if (to == st) {
            good[st] = true; return;
        }
        if (!used[to]) dfs2(to, st);
    }
}

vector<int> who_wins(vector<int> A, vector<int> R, vector<int> u, vector<int> v) {
    n = A.size(), m = u.size();
    a = A, r = R;
    for (int i = 0; i < m; i ++) {
        g[u[i]].push_back(v[i]);
    }
    if (a[0] == 1) {
        // all Arez
        for (int i = 0; i < n; i ++) {
            if (r[i] == 0) continue;
            for (int j = 0; j < n; j ++) used[j] = false;
            dfs1(i, i);
        }
    }
    else {
        // all Borz
        for (int i = 0; i < n; i ++) {
            if (r[i] == 1) continue;
            for (int j = 0; j < n; j ++) used[j] = false;
            dfs2(i, i);
        }
    }

    vector<int> res;
    for (int s = 0; s < n; s ++) {
        ans = false;
        for (int i = 0; i < n; i ++) used[i] = 0;
        dfs(s);
        res.push_back(ans ^ (a[0] == 0));
    }
    return res;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51