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Submission #676390

# Submission time Handle Problem Language Result Execution time Memory
676390 2022-12-30T15:32:10 Z stevancv One-Way Streets (CEOI17_oneway) C++14
100 / 100
 81 ms 15312 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const ll linf = 1e18;
vector<array<int, 3>> g[N];
int a[N], dep[N], mn[N], ans[N];
void Dfs(int s, int e, int d) {
    dep[s] = mn[s] = d;
    for (auto u : g[s]) {
        if (u[1] == e) continue;
        if (dep[u[0]] == 0) {
            Dfs(u[0], u[1], d + 1);
            if (mn[u[0]] > dep[s]) {
                if (a[u[0]] > 0) ans[u[1]] = u[2] ^ 1;
                else if (a[u[0]] < 0) ans[u[1]] = u[2];
            }
            a[s] += a[u[0]];
            smin(mn[s], mn[u[0]]);
        }
        else smin(mn[s], dep[u[0]]);
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        g[u].push_back({v, i, 0});
        g[v].push_back({u, i, 1});
    }
    for (int i = 0; i < m; i++) ans[i] = 2;
    int p; cin >> p;
    for (int i = 0; i < p; i++) {
        int u, v;
        cin >> u >> v;
        a[u] += 1;
        a[v] -= 1;
    }
    for (int i = 1; i <= n; i++) {
        if (dep[i] == 0) Dfs(i, -1, 1);
    }
    for (int i = 0; i < m; i++) {
        if (ans[i] == 0) cout << 'R';
        if (ans[i] == 1) cout << 'L';
        if (ans[i] == 2) cout << 'B';
    }
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2772 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2772 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 44 ms 9548 KB Output is correct
12 Correct 37 ms 10436 KB Output is correct
13 Correct 45 ms 11216 KB Output is correct
14 Correct 60 ms 11584 KB Output is correct
15 Correct 53 ms 11656 KB Output is correct
16 Correct 49 ms 9724 KB Output is correct
17 Correct 48 ms 11128 KB Output is correct
18 Correct 47 ms 9676 KB Output is correct
19 Correct 42 ms 12224 KB Output is correct
20 Correct 37 ms 9768 KB Output is correct
21 Correct 39 ms 9420 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2772 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 44 ms 9548 KB Output is correct
12 Correct 37 ms 10436 KB Output is correct
13 Correct 45 ms 11216 KB Output is correct
14 Correct 60 ms 11584 KB Output is correct
15 Correct 53 ms 11656 KB Output is correct
16 Correct 49 ms 9724 KB Output is correct
17 Correct 48 ms 11128 KB Output is correct
18 Correct 47 ms 9676 KB Output is correct
19 Correct 42 ms 12224 KB Output is correct
20 Correct 37 ms 9768 KB Output is correct
21 Correct 39 ms 9420 KB Output is correct
22 Correct 62 ms 12236 KB Output is correct
23 Correct 81 ms 10696 KB Output is correct
24 Correct 79 ms 10872 KB Output is correct
25 Correct 57 ms 15312 KB Output is correct
26 Correct 56 ms 11852 KB Output is correct
27 Correct 57 ms 10740 KB Output is correct
28 Correct 28 ms 7424 KB Output is correct
29 Correct 54 ms 10416 KB Output is correct
30 Correct 57 ms 10524 KB Output is correct
31 Correct 56 ms 10872 KB Output is correct
32 Correct 48 ms 12648 KB Output is correct