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Submission #630460

# Submission time Handle Problem Language Result Execution time Memory
630460 2022-08-16T11:42:18 Z Ooops_sorry Game (APIO22_game) C++17
60 / 100
 4000 ms 40296 KB 
#include<bits/stdc++.h>

using namespace std;

mt19937 rnd(51);

#define ll long long
#define pb push_back
#define ld long double

const int N = 3e5 + 10, INF = 1e9, K = 700;
int n, k, in_block[N], out_block[N], in[N], out[N], block[N], cnt[N], q[N];
bool used[N];
vector<int> g[N], gr[N];
bool cycle = 0;
set<int> need;

void dfs_block(int u) {
    int l = 0, r = 0;
    q[r++] = u;
    while (l < r) {
        int v = q[l++];
        if (v >= k && out_block[v] < in_block[v]) {
            cycle = 1;
        }
        if (v >= k && !used[v] && out_block[v] == in_block[v]) {
            need.insert(in_block[v]);
            block[v] = in_block[v];
            used[v] = 1;
        }
        for (auto to : g[v]) {
            if (in_block[v] > in_block[to]) {
                in_block[to] = in_block[v];
                q[r++] = to;
            }
        }
    }
}

void zhfs_block(int u) {
    int l = 0, r = 0;
    q[r++] = u;
    while (l < r) {
        int v = q[l++];
        if (v >= k && out_block[v] < in_block[v]) {
            cycle = 1;
        }
        if (v >= k && !used[v] && out_block[v] == in_block[v]) {
            need.insert(in_block[v]);
            block[v] = in_block[v];
            used[v] = 1;
        }
        for (auto to : gr[v]) {
            if (out_block[v] < out_block[to]) {
                out_block[to] = out_block[v];
                q[r++] = to;
            }
        }
    }
}

void dfs(int u) {
    int l = 0, r = 0;
    q[r++] = u;
    while (l < r) {
        int v = q[l++];
        if (v >= k && out[v] <= in[v]) {
            cycle = 1;
        }
        for (auto to : g[v]) {
            if (block[v] == block[to] && in[v] > in[to]) {
                in[to] = in[v];
                q[r++] = to;
            }
        }
    }
}

void zhfs(int u) {
    int l = 0, r = 0;
    q[r++] = u;
    while (l < r) {
        int v = q[l++];
        if (v >= k && out[v] <= in[v]) {
            cycle = 1;
        }
        for (auto to : gr[v]) {
            if (block[v] == block[to] && out[v] < out[to]) {
                out[to] = out[v];
                q[r++] = to;
            }
        }
    }
}

int add_teleporter(int u, int v) {
    if (max(u, v) < k) {
        if (u >= v) {
            cycle = 1;
        }
    } else {
        g[u].pb(v);
        gr[v].pb(u);
        if (in_block[v] < in_block[u]) {
            in_block[v] = in_block[u];
            dfs_block(v);
        }
        if (out_block[u] > out_block[v]) {
            out_block[u] = out_block[v];
            zhfs_block(u);
        }
        for (auto v : need) {
            for (int vert = v * K; vert < min(k, (v + 1) * K); vert++) {
                zhfs(vert);
                dfs(vert);
            }
        }
        need.clear();
        if (block[v] == block[u] && in[v] < in[u]) {
            in[v] = in[u];
            dfs(v);
        }
        if (block[v] == block[u] && out[u] > out[v]) {
            out[u] = out[v];
            zhfs(u);
        }
    }
    return cycle;
}

void init(int n_, int k_) {
    n = n_, k = k_;
    for (int i = 0; i < n; i++) {
        in_block[i] = -INF, out_block[i] = INF;
        in[i] = -INF, out[i] = INF;
        block[i] = -(i + 1);
    }
    for (int i = 0; i < k; i++) {
        in_block[i] = out_block[i] = block[i] = i / K;
        in[i] = out[i] = i;
    }
}

#ifdef LOCAL

signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif // LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m, k;
    cin >> n >> m >> k;
    vector<pair<int,int>> e(m);
    for (int i = 0; i < m; i++) {
        cin >> e[i].first >> e[i].second;
    }
    init(n, k);
    int i;
    for (i = 0; i < m; i++) {
        int res = add_teleporter(e[i].first, e[i].second);
        assert(res == 0 || res == 1);
        if (res == 1) {
            break;
        }
    }
    cout << i << endl;
    return 0;
}

#endif // LOCAL

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14416 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 7 ms 14416 KB Output is correct
4 Correct 7 ms 14416 KB Output is correct
5 Correct 7 ms 14416 KB Output is correct
6 Correct 8 ms 14416 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14416 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 7 ms 14416 KB Output is correct
4 Correct 7 ms 14416 KB Output is correct
5 Correct 7 ms 14416 KB Output is correct
6 Correct 8 ms 14416 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 7 ms 14416 KB Output is correct
9 Correct 8 ms 14380 KB Output is correct
10 Correct 8 ms 14416 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14416 KB Output is correct
13 Correct 8 ms 14416 KB Output is correct
14 Correct 8 ms 14416 KB Output is correct
15 Correct 9 ms 14416 KB Output is correct
16 Correct 8 ms 14340 KB Output is correct
17 Correct 8 ms 14416 KB Output is correct
18 Correct 7 ms 14368 KB Output is correct
19 Correct 7 ms 14416 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14416 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 7 ms 14416 KB Output is correct
4 Correct 7 ms 14416 KB Output is correct
5 Correct 7 ms 14416 KB Output is correct
6 Correct 8 ms 14416 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 7 ms 14416 KB Output is correct
9 Correct 8 ms 14380 KB Output is correct
10 Correct 8 ms 14416 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14416 KB Output is correct
13 Correct 8 ms 14416 KB Output is correct
14 Correct 8 ms 14416 KB Output is correct
15 Correct 9 ms 14416 KB Output is correct
16 Correct 8 ms 14340 KB Output is correct
17 Correct 8 ms 14416 KB Output is correct
18 Correct 7 ms 14368 KB Output is correct
19 Correct 7 ms 14416 KB Output is correct
20 Correct 7 ms 14416 KB Output is correct
21 Correct 7 ms 14380 KB Output is correct
22 Correct 8 ms 14416 KB Output is correct
23 Correct 8 ms 14416 KB Output is correct
24 Correct 11 ms 14416 KB Output is correct
25 Correct 10 ms 14544 KB Output is correct
26 Correct 10 ms 14544 KB Output is correct
27 Correct 14 ms 14468 KB Output is correct
28 Correct 11 ms 14464 KB Output is correct
29 Correct 13 ms 14440 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14416 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 7 ms 14416 KB Output is correct
4 Correct 7 ms 14416 KB Output is correct
5 Correct 7 ms 14416 KB Output is correct
6 Correct 8 ms 14416 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 7 ms 14416 KB Output is correct
9 Correct 8 ms 14380 KB Output is correct
10 Correct 8 ms 14416 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14416 KB Output is correct
13 Correct 8 ms 14416 KB Output is correct
14 Correct 8 ms 14416 KB Output is correct
15 Correct 9 ms 14416 KB Output is correct
16 Correct 8 ms 14340 KB Output is correct
17 Correct 8 ms 14416 KB Output is correct
18 Correct 7 ms 14368 KB Output is correct
19 Correct 7 ms 14416 KB Output is correct
20 Correct 7 ms 14416 KB Output is correct
21 Correct 7 ms 14380 KB Output is correct
22 Correct 8 ms 14416 KB Output is correct
23 Correct 8 ms 14416 KB Output is correct
24 Correct 11 ms 14416 KB Output is correct
25 Correct 10 ms 14544 KB Output is correct
26 Correct 10 ms 14544 KB Output is correct
27 Correct 14 ms 14468 KB Output is correct
28 Correct 11 ms 14464 KB Output is correct
29 Correct 13 ms 14440 KB Output is correct
30 Correct 24 ms 16104 KB Output is correct
31 Correct 13 ms 15312 KB Output is correct
32 Correct 28 ms 16840 KB Output is correct
33 Correct 23 ms 16824 KB Output is correct
34 Correct 716 ms 17064 KB Output is correct
35 Correct 272 ms 16984 KB Output is correct
36 Correct 52 ms 16932 KB Output is correct
37 Correct 55 ms 16892 KB Output is correct
38 Correct 123 ms 16544 KB Output is correct
39 Correct 149 ms 16616 KB Output is correct
40 Correct 582 ms 17164 KB Output is correct
41 Correct 146 ms 16660 KB Output is correct
42 Correct 99 ms 16664 KB Output is correct
43 Correct 49 ms 17108 KB Output is correct
44 Correct 288 ms 16944 KB Output is correct

Subtask #5
0.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14416 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 7 ms 14416 KB Output is correct
4 Correct 7 ms 14416 KB Output is correct
5 Correct 7 ms 14416 KB Output is correct
6 Correct 8 ms 14416 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 7 ms 14416 KB Output is correct
9 Correct 8 ms 14380 KB Output is correct
10 Correct 8 ms 14416 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14416 KB Output is correct
13 Correct 8 ms 14416 KB Output is correct
14 Correct 8 ms 14416 KB Output is correct
15 Correct 9 ms 14416 KB Output is correct
16 Correct 8 ms 14340 KB Output is correct
17 Correct 8 ms 14416 KB Output is correct
18 Correct 7 ms 14368 KB Output is correct
19 Correct 7 ms 14416 KB Output is correct
20 Correct 7 ms 14416 KB Output is correct
21 Correct 7 ms 14380 KB Output is correct
22 Correct 8 ms 14416 KB Output is correct
23 Correct 8 ms 14416 KB Output is correct
24 Correct 11 ms 14416 KB Output is correct
25 Correct 10 ms 14544 KB Output is correct
26 Correct 10 ms 14544 KB Output is correct
27 Correct 14 ms 14468 KB Output is correct
28 Correct 11 ms 14464 KB Output is correct
29 Correct 13 ms 14440 KB Output is correct
30 Correct 24 ms 16104 KB Output is correct
31 Correct 13 ms 15312 KB Output is correct
32 Correct 28 ms 16840 KB Output is correct
33 Correct 23 ms 16824 KB Output is correct
34 Correct 716 ms 17064 KB Output is correct
35 Correct 272 ms 16984 KB Output is correct
36 Correct 52 ms 16932 KB Output is correct
37 Correct 55 ms 16892 KB Output is correct
38 Correct 123 ms 16544 KB Output is correct
39 Correct 149 ms 16616 KB Output is correct
40 Correct 582 ms 17164 KB Output is correct
41 Correct 146 ms 16660 KB Output is correct
42 Correct 99 ms 16664 KB Output is correct
43 Correct 49 ms 17108 KB Output is correct
44 Correct 288 ms 16944 KB Output is correct
45 Correct 231 ms 31680 KB Output is correct
46 Correct 16 ms 20680 KB Output is correct
47 Correct 14 ms 20560 KB Output is correct
48 Correct 449 ms 40296 KB Output is correct
49 Correct 305 ms 39304 KB Output is correct
50 Execution timed out 4080 ms 34792 KB Time limit exceeded
51 Halted 0 ms 0 KB -