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Submission #727454

# Submission time Handle Problem Language Result Execution time Memory
727454 2023-04-20T17:44:35 Z finn__ From Hacks to Snitches (BOI21_watchmen) C++17
25 / 100
 6000 ms 120292 KB 
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")

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

constexpr size_t N = 250000;

vector<unsigned> g[N], t[N];
unsigned l[N], resid[N], c[N];

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    size_t n, m;
    cin >> n >> m;
    for (size_t i = 0; i < m; ++i)
    {
        unsigned u, v;
        cin >> u >> v;
        g[u - 1].push_back(v - 1);
        g[v - 1].push_back(u - 1);
    }
    size_t k;
    cin >> k;
    for (size_t i = 0; i < k; ++i)
    {
        size_t L;
        cin >> L;
        for (size_t j = 0; j < L; ++j)
        {
            unsigned u;
            cin >> u;
            l[u - 1] = L;
            resid[u - 1] = j;
            t[u - 1].resize(L);
            c[u - 1] = i;
        }
    }

    for (size_t i = 0; i < n; ++i)
    {
        if (t[i].empty())
            t[i].resize(1);
        fill(t[i].begin(), t[i].end(), UINT_MAX);
    }

    priority_queue<pair<unsigned, unsigned>, vector<pair<unsigned, unsigned>>,
                   greater<pair<unsigned, unsigned>>>
        q;
    q.emplace(0, 0);
    t[0][0] = 0;
    while (!q.empty())
    {
        auto [d, u] = q.top();
        q.pop();
        if (d != t[u][l[u] ? d % l[u] : 0])
            continue;
        if (u == n - 1)
        {
            cout << d << '\n';
            return 0;
        }

        if (!l[u])
        {
            for (unsigned const &w : g[u])
                if (!l[w])
                {
                    if (d + 1 < t[w][0])
                    {
                        t[w][0] = d + 1;
                        q.emplace(d + 1, w);
                    }
                }
                else
                {
                    if ((d + 1) % l[w] != resid[w] && d + 1 < t[w][(d + 1) % l[w]])
                    {
                        t[w][(d + 1) % l[w]] = d + 1;
                        q.emplace(d + 1, w);
                    }
                    unsigned const x = d + (resid[w] - (d % l[w]) + l[w]) % l[w];
                    if (x + 1 < t[w][(x + 1) % l[w]])
                    {
                        t[w][(x + 1) % l[w]] = x + 1;
                        q.emplace(x + 1, w);
                    }
                }
        }
        else
        {
            for (auto it = g[u].begin(); it != g[u].end();)
            {
                unsigned &w = *it;
                if (!l[w])
                {
                    if (d + 1 < t[w][0])
                    {
                        t[w][0] = d + 1;
                        q.emplace(d + 1, w);
                    }
                    size_t i = it - g[u].begin();
                    swap(w, g[u].back());
                    g[u].pop_back();
                    it = g[u].begin() + i;
                }
                else
                {
                    if (c[u] == c[w])
                    {
                        if ((d + 1) % l[u] != resid[w] &&
                            (resid[u] != (resid[w] + 1) % l[u] || (d % l[u]) != resid[w]) &&
                            d + 1 < t[w][(d + 1) % l[u]])
                        {
                            t[w][(d + 1) % l[u]] = d + 1;
                            q.emplace(d + 1, w);
                        }
                        ++it;
                    }
                    else
                    {
                        unsigned x = d + (resid[w] - d % l[w] + l[w]) % l[w];
                        if (x % l[u] != resid[u])
                        {
                            if ((d + 1) % l[w] != resid[w] && d + 1 < t[w][(d + 1) % l[w]])
                            {
                                t[w][(d + 1) % l[w]] = d + 1;
                                q.emplace(d + 1, w);
                            }
                            if (x + 1 < t[w][(x + 1) % l[w]])
                            {
                                t[w][(x + 1) % l[w]] = x + 1;
                                q.emplace(x + 1, w);
                            }
                            size_t i = it - g[u].begin();
                            swap(w, g[u].back());
                            g[u].pop_back();
                            it = g[u].begin() + i;
                        }
                        else
                        {
                            if ((d + 1) % l[w] != resid[w] && d + 1 < t[w][(d + 1) % l[w]])
                            {
                                t[w][(d + 1) % l[w]] = d + 1;
                                q.emplace(d + 1, w);
                            }
                            d += l[u];
                            if ((d + 1) % l[w] != resid[w] &&
                                d + 1 < t[w][(d + 1) % l[w]])
                            {
                                t[w][(d + 1) % l[w]] = d + 1;
                                q.emplace(d + 1, w);
                            }
                            x = d + (resid[w] - d % l[w] + l[w]) % l[w];
                            if (x % l[u] != resid[u] && x + 1 < t[w][(x + 1) % l[w]])
                            {
                                t[w][(x + 1) % l[w]] = x + 1;
                                q.emplace(x + 1, w);
                            }
                            ++it;
                        }
                    }
                }
            }
            if ((d + 1) % l[u] != resid[u] && d + 1 < t[u][(d + 1) % l[u]])
            {
                t[u][(d + 1) % l[u]] = d + 1;
                q.emplace(d + 1, u);
            }
        }
    }

    cout << "impossible\n";
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 13012 KB Output is correct
2 Correct 88 ms 19188 KB Output is correct
3 Correct 71 ms 18668 KB Output is correct
4 Correct 95 ms 18768 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 67 ms 18592 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 13012 KB Output is correct
2 Correct 68 ms 19112 KB Output is correct
3 Correct 67 ms 18572 KB Output is correct
4 Correct 90 ms 18828 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 68 ms 18568 KB Output is correct
7 Correct 64 ms 18640 KB Output is correct
8 Correct 62 ms 18568 KB Output is correct
9 Correct 70 ms 18588 KB Output is correct
10 Correct 67 ms 18748 KB Output is correct
11 Correct 64 ms 18700 KB Output is correct
12 Correct 73 ms 18636 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 13012 KB Output is correct
2 Correct 68 ms 19112 KB Output is correct
3 Correct 67 ms 18572 KB Output is correct
4 Correct 90 ms 18828 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 68 ms 18568 KB Output is correct
7 Correct 64 ms 18640 KB Output is correct
8 Correct 62 ms 18568 KB Output is correct
9 Correct 70 ms 18588 KB Output is correct
10 Correct 67 ms 18748 KB Output is correct
11 Correct 64 ms 18700 KB Output is correct
12 Correct 73 ms 18636 KB Output is correct
13 Correct 19 ms 13020 KB Output is correct
14 Correct 73 ms 19164 KB Output is correct
15 Correct 68 ms 18656 KB Output is correct
16 Correct 102 ms 18836 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 84 ms 18676 KB Output is correct
19 Correct 65 ms 18588 KB Output is correct
20 Correct 64 ms 18636 KB Output is correct
21 Correct 63 ms 18532 KB Output is correct
22 Correct 85 ms 18812 KB Output is correct
23 Correct 68 ms 18636 KB Output is correct
24 Correct 65 ms 18632 KB Output is correct
25 Correct 1464 ms 61312 KB Output is correct
26 Correct 1316 ms 66260 KB Output is correct
27 Correct 1179 ms 62016 KB Output is correct
28 Correct 1130 ms 65968 KB Output is correct
29 Correct 1541 ms 56476 KB Output is correct
30 Correct 1493 ms 97996 KB Output is correct
31 Correct 1471 ms 104304 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 13012 KB Output is correct
2 Correct 68 ms 19112 KB Output is correct
3 Correct 67 ms 18572 KB Output is correct
4 Correct 90 ms 18828 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 68 ms 18568 KB Output is correct
7 Correct 64 ms 18640 KB Output is correct
8 Correct 62 ms 18568 KB Output is correct
9 Correct 70 ms 18588 KB Output is correct
10 Correct 67 ms 18748 KB Output is correct
11 Correct 64 ms 18700 KB Output is correct
12 Correct 73 ms 18636 KB Output is correct
13 Correct 19 ms 13020 KB Output is correct
14 Correct 73 ms 19164 KB Output is correct
15 Correct 68 ms 18656 KB Output is correct
16 Correct 102 ms 18836 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 84 ms 18676 KB Output is correct
19 Correct 65 ms 18588 KB Output is correct
20 Correct 64 ms 18636 KB Output is correct
21 Correct 63 ms 18532 KB Output is correct
22 Correct 85 ms 18812 KB Output is correct
23 Correct 68 ms 18636 KB Output is correct
24 Correct 65 ms 18632 KB Output is correct
25 Correct 1464 ms 61312 KB Output is correct
26 Correct 1316 ms 66260 KB Output is correct
27 Correct 1179 ms 62016 KB Output is correct
28 Correct 1130 ms 65968 KB Output is correct
29 Correct 1541 ms 56476 KB Output is correct
30 Correct 1493 ms 97996 KB Output is correct
31 Correct 1471 ms 104304 KB Output is correct
32 Correct 19 ms 13524 KB Output is correct
33 Correct 77 ms 20340 KB Output is correct
34 Correct 67 ms 19748 KB Output is correct
35 Correct 92 ms 19984 KB Output is correct
36 Correct 8 ms 12116 KB Output is correct
37 Correct 69 ms 19764 KB Output is correct
38 Correct 87 ms 19672 KB Output is correct
39 Correct 71 ms 19788 KB Output is correct
40 Correct 83 ms 19700 KB Output is correct
41 Correct 95 ms 19980 KB Output is correct
42 Correct 70 ms 19788 KB Output is correct
43 Correct 90 ms 19880 KB Output is correct
44 Correct 1433 ms 99904 KB Output is correct
45 Correct 1428 ms 104792 KB Output is correct
46 Correct 1317 ms 100760 KB Output is correct
47 Correct 1111 ms 104604 KB Output is correct
48 Correct 1465 ms 95592 KB Output is correct
49 Correct 1467 ms 98008 KB Output is correct
50 Correct 1504 ms 104396 KB Output is correct
51 Correct 1927 ms 109592 KB Output is correct
52 Correct 2257 ms 120292 KB Output is correct
53 Correct 1897 ms 110332 KB Output is correct
54 Correct 975 ms 96480 KB Output is correct
55 Execution timed out 6020 ms 110176 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 13012 KB Output is correct
2 Correct 88 ms 19188 KB Output is correct
3 Correct 71 ms 18668 KB Output is correct
4 Correct 95 ms 18768 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 67 ms 18592 KB Output is correct
7 Correct 17 ms 13012 KB Output is correct
8 Correct 68 ms 19112 KB Output is correct
9 Correct 67 ms 18572 KB Output is correct
10 Correct 90 ms 18828 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 68 ms 18568 KB Output is correct
13 Correct 64 ms 18640 KB Output is correct
14 Correct 62 ms 18568 KB Output is correct
15 Correct 70 ms 18588 KB Output is correct
16 Correct 67 ms 18748 KB Output is correct
17 Correct 64 ms 18700 KB Output is correct
18 Correct 73 ms 18636 KB Output is correct
19 Correct 7 ms 11988 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 ms 12052 KB Output is correct
22 Correct 19 ms 12928 KB Output is correct
23 Correct 68 ms 19148 KB Output is correct
24 Correct 69 ms 18712 KB Output is correct
25 Correct 95 ms 18816 KB Output is correct
26 Correct 8 ms 12116 KB Output is correct
27 Correct 68 ms 18608 KB Output is correct
28 Correct 62 ms 18552 KB Output is correct
29 Correct 63 ms 18580 KB Output is correct
30 Correct 58 ms 18648 KB Output is correct
31 Correct 68 ms 18764 KB Output is correct
32 Correct 63 ms 18696 KB Output is correct
33 Correct 64 ms 18636 KB Output is correct
34 Incorrect 1358 ms 61544 KB Output isn't correct
35 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 13012 KB Output is correct
2 Correct 88 ms 19188 KB Output is correct
3 Correct 71 ms 18668 KB Output is correct
4 Correct 95 ms 18768 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 67 ms 18592 KB Output is correct
7 Correct 17 ms 13012 KB Output is correct
8 Correct 68 ms 19112 KB Output is correct
9 Correct 67 ms 18572 KB Output is correct
10 Correct 90 ms 18828 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 68 ms 18568 KB Output is correct
13 Correct 64 ms 18640 KB Output is correct
14 Correct 62 ms 18568 KB Output is correct
15 Correct 70 ms 18588 KB Output is correct
16 Correct 67 ms 18748 KB Output is correct
17 Correct 64 ms 18700 KB Output is correct
18 Correct 73 ms 18636 KB Output is correct
19 Correct 19 ms 13020 KB Output is correct
20 Correct 73 ms 19164 KB Output is correct
21 Correct 68 ms 18656 KB Output is correct
22 Correct 102 ms 18836 KB Output is correct
23 Correct 8 ms 12116 KB Output is correct
24 Correct 84 ms 18676 KB Output is correct
25 Correct 65 ms 18588 KB Output is correct
26 Correct 64 ms 18636 KB Output is correct
27 Correct 63 ms 18532 KB Output is correct
28 Correct 85 ms 18812 KB Output is correct
29 Correct 68 ms 18636 KB Output is correct
30 Correct 65 ms 18632 KB Output is correct
31 Correct 1464 ms 61312 KB Output is correct
32 Correct 1316 ms 66260 KB Output is correct
33 Correct 1179 ms 62016 KB Output is correct
34 Correct 1130 ms 65968 KB Output is correct
35 Correct 1541 ms 56476 KB Output is correct
36 Correct 1493 ms 97996 KB Output is correct
37 Correct 1471 ms 104304 KB Output is correct
38 Correct 7 ms 11988 KB Output is correct
39 Correct 7 ms 11988 KB Output is correct
40 Correct 7 ms 12052 KB Output is correct
41 Correct 19 ms 12928 KB Output is correct
42 Correct 68 ms 19148 KB Output is correct
43 Correct 69 ms 18712 KB Output is correct
44 Correct 95 ms 18816 KB Output is correct
45 Correct 8 ms 12116 KB Output is correct
46 Correct 68 ms 18608 KB Output is correct
47 Correct 62 ms 18552 KB Output is correct
48 Correct 63 ms 18580 KB Output is correct
49 Correct 58 ms 18648 KB Output is correct
50 Correct 68 ms 18764 KB Output is correct
51 Correct 63 ms 18696 KB Output is correct
52 Correct 64 ms 18636 KB Output is correct
53 Incorrect 1358 ms 61544 KB Output isn't correct
54 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 13012 KB Output is correct
2 Correct 88 ms 19188 KB Output is correct
3 Correct 71 ms 18668 KB Output is correct
4 Correct 95 ms 18768 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 67 ms 18592 KB Output is correct
7 Correct 17 ms 13012 KB Output is correct
8 Correct 68 ms 19112 KB Output is correct
9 Correct 67 ms 18572 KB Output is correct
10 Correct 90 ms 18828 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 68 ms 18568 KB Output is correct
13 Correct 64 ms 18640 KB Output is correct
14 Correct 62 ms 18568 KB Output is correct
15 Correct 70 ms 18588 KB Output is correct
16 Correct 67 ms 18748 KB Output is correct
17 Correct 64 ms 18700 KB Output is correct
18 Correct 73 ms 18636 KB Output is correct
19 Correct 19 ms 13020 KB Output is correct
20 Correct 73 ms 19164 KB Output is correct
21 Correct 68 ms 18656 KB Output is correct
22 Correct 102 ms 18836 KB Output is correct
23 Correct 8 ms 12116 KB Output is correct
24 Correct 84 ms 18676 KB Output is correct
25 Correct 65 ms 18588 KB Output is correct
26 Correct 64 ms 18636 KB Output is correct
27 Correct 63 ms 18532 KB Output is correct
28 Correct 85 ms 18812 KB Output is correct
29 Correct 68 ms 18636 KB Output is correct
30 Correct 65 ms 18632 KB Output is correct
31 Correct 1464 ms 61312 KB Output is correct
32 Correct 1316 ms 66260 KB Output is correct
33 Correct 1179 ms 62016 KB Output is correct
34 Correct 1130 ms 65968 KB Output is correct
35 Correct 1541 ms 56476 KB Output is correct
36 Correct 1493 ms 97996 KB Output is correct
37 Correct 1471 ms 104304 KB Output is correct
38 Correct 19 ms 13524 KB Output is correct
39 Correct 77 ms 20340 KB Output is correct
40 Correct 67 ms 19748 KB Output is correct
41 Correct 92 ms 19984 KB Output is correct
42 Correct 8 ms 12116 KB Output is correct
43 Correct 69 ms 19764 KB Output is correct
44 Correct 87 ms 19672 KB Output is correct
45 Correct 71 ms 19788 KB Output is correct
46 Correct 83 ms 19700 KB Output is correct
47 Correct 95 ms 19980 KB Output is correct
48 Correct 70 ms 19788 KB Output is correct
49 Correct 90 ms 19880 KB Output is correct
50 Correct 1433 ms 99904 KB Output is correct
51 Correct 1428 ms 104792 KB Output is correct
52 Correct 1317 ms 100760 KB Output is correct
53 Correct 1111 ms 104604 KB Output is correct
54 Correct 1465 ms 95592 KB Output is correct
55 Correct 1467 ms 98008 KB Output is correct
56 Correct 1504 ms 104396 KB Output is correct
57 Correct 1927 ms 109592 KB Output is correct
58 Correct 2257 ms 120292 KB Output is correct
59 Correct 1897 ms 110332 KB Output is correct
60 Correct 975 ms 96480 KB Output is correct
61 Execution timed out 6020 ms 110176 KB Time limit exceeded
62 Halted 0 ms 0 KB -