Submission #733185

#	Time	Username	Problem	Language	Result	Execution time	Memory
733185		t6twotwo	Toy Train (IOI17_train)	C++17	0 / 100	2073 ms	1140 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> pos(N, -1), c{-1};
        int t = 0;
        auto dfs = [&](auto dfs, int x) -> int {
            pos[x] = t++;
            if (R[x]) {
                c.push_back(pos[x]);
            }
            for (int y : adj[x]) {
                if (pos[y] == -1) {
                    if (dfs(dfs, y) == A[x]) {
                        return A[x];
                    }
                } else {
                    if (A[x] == (pos[y] <= c.back())) {
                        return A[x];
                    }
                }
            }
            pos[x] = -1; t--;
            if (R[x]) {
                c.pop_back();
            }
            return !A[x];
        };
        ans[i] = dfs(dfs, i);
    }
    return ans;
}

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