Submission #733686

#	Time	Username	Problem	Language	Result	Execution time	Memory
733686		t6twotwo	Toy Train (IOI17_train)	C++17	15 / 100	2064 ms	1364 KiB

train

#include "train.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> who_wins(vector<int> A, vector<int> R, vector<int> U, vector<int> V) {
    int N = A.size();
    int M = U.size();
    vector<vector<int>> adj(N);
    for (int i = 0; i < M; i++) {
        adj[U[i]].push_back(V[i]);
    }
    vector<int> ans(N);
    for (int i = 0; i < N; i++) {
        vector<int> p;
        vector<bool> vis(N);
        auto dfs = [&](auto dfs, int x) -> int {
            p.push_back(x);
            vis[x] = 1;
            int f = 1;
            for (int y : adj[x]) {
                if (!vis[y]) {
                    if (dfs(dfs, y) == A[x]) {
                        f = 0;
                    }
                } else {
                    int cyc = 0;
                    for (int i = p.size() - 1; i >= 0; i--) {
                        cyc |= R[p[i]];
                        if (p[i] == y) {
                            break;
                        }
                    }
                    if (A[x] == cyc) {
                        f = 0;
                    }
                }
            }
            vis[x] = 0;
            p.pop_back();
            return A[x] ^ f;
        };
        ans[i] = dfs(dfs, i);
    }
    return ans;
}

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