Submission #1060343

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060343		Zicrus	Toy Train (IOI17_train)	C++17	11 / 100	602 ms	2136 KiB

train

#include <bits/stdc++.h>
#include "train.h"
using namespace std;

typedef long long ll;

vector<vector<ll>> adj, revAdj;
vector<bool> vst;
bool poss = false;

void dfs1(ll cur, ll root) {
    vst[cur] = true;
    for (auto &e : revAdj[cur]) {
        if (e == root) poss = true;
        if (vst[e]) continue;
        dfs1(e, root);
    }
}

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
    ll n = a.size(), m = u.size();
	vector<int> res(n);
	adj = vector<vector<ll>>(n);
	revAdj = vector<vector<ll>>(n);
    for (int i = 0; i < m; i++) {
        adj[u[i]].push_back(v[i]);
        revAdj[v[i]].push_back(u[i]);
    }

    for (int i = 0; i < n; i++) {
        if (!r[i]) continue;
        vst = vector<bool>(n);
        poss = false;
        dfs1(i, i);
        if (poss) {
            for (int j = 0; j < n; j++) {
                if (!vst[j]) continue;
                res[j] = true;
            }
        }
    }

	return res;
}

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