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Submission #727453

# Submission time Handle Problem Language Result Execution time Memory
727453 2023-04-20T17:32:48 Z finn__ From Hacks to Snitches (BOI21_watchmen) C++17
15 / 100
 6000 ms 66176 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);
                    }
                    ++it;
                }
                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 18 ms 13012 KB Output is correct
2 Correct 72 ms 19076 KB Output is correct
3 Correct 69 ms 18628 KB Output is correct
4 Correct 98 ms 18832 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 75 ms 18596 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 74 ms 19112 KB Output is correct
3 Correct 69 ms 18636 KB Output is correct
4 Correct 90 ms 18832 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 70 ms 18604 KB Output is correct
7 Correct 66 ms 18636 KB Output is correct
8 Correct 65 ms 18660 KB Output is correct
9 Correct 84 ms 18596 KB Output is correct
10 Correct 87 ms 18756 KB Output is correct
11 Correct 89 ms 18696 KB Output is correct
12 Correct 83 ms 18524 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 74 ms 19112 KB Output is correct
3 Correct 69 ms 18636 KB Output is correct
4 Correct 90 ms 18832 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 70 ms 18604 KB Output is correct
7 Correct 66 ms 18636 KB Output is correct
8 Correct 65 ms 18660 KB Output is correct
9 Correct 84 ms 18596 KB Output is correct
10 Correct 87 ms 18756 KB Output is correct
11 Correct 89 ms 18696 KB Output is correct
12 Correct 83 ms 18524 KB Output is correct
13 Correct 18 ms 12932 KB Output is correct
14 Correct 77 ms 19148 KB Output is correct
15 Correct 68 ms 18680 KB Output is correct
16 Correct 91 ms 18832 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 72 ms 18564 KB Output is correct
19 Correct 80 ms 18640 KB Output is correct
20 Correct 72 ms 18572 KB Output is correct
21 Correct 65 ms 18636 KB Output is correct
22 Correct 80 ms 18820 KB Output is correct
23 Correct 74 ms 18592 KB Output is correct
24 Correct 72 ms 18532 KB Output is correct
25 Correct 1360 ms 61516 KB Output is correct
26 Correct 1334 ms 66176 KB Output is correct
27 Correct 1260 ms 61968 KB Output is correct
28 Correct 1018 ms 65948 KB Output is correct
29 Execution timed out 6035 ms 56668 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 74 ms 19112 KB Output is correct
3 Correct 69 ms 18636 KB Output is correct
4 Correct 90 ms 18832 KB Output is correct
5 Correct 8 ms 12116 KB Output is correct
6 Correct 70 ms 18604 KB Output is correct
7 Correct 66 ms 18636 KB Output is correct
8 Correct 65 ms 18660 KB Output is correct
9 Correct 84 ms 18596 KB Output is correct
10 Correct 87 ms 18756 KB Output is correct
11 Correct 89 ms 18696 KB Output is correct
12 Correct 83 ms 18524 KB Output is correct
13 Correct 18 ms 12932 KB Output is correct
14 Correct 77 ms 19148 KB Output is correct
15 Correct 68 ms 18680 KB Output is correct
16 Correct 91 ms 18832 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 72 ms 18564 KB Output is correct
19 Correct 80 ms 18640 KB Output is correct
20 Correct 72 ms 18572 KB Output is correct
21 Correct 65 ms 18636 KB Output is correct
22 Correct 80 ms 18820 KB Output is correct
23 Correct 74 ms 18592 KB Output is correct
24 Correct 72 ms 18532 KB Output is correct
25 Correct 1360 ms 61516 KB Output is correct
26 Correct 1334 ms 66176 KB Output is correct
27 Correct 1260 ms 61968 KB Output is correct
28 Correct 1018 ms 65948 KB Output is correct
29 Execution timed out 6035 ms 56668 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 72 ms 19076 KB Output is correct
3 Correct 69 ms 18628 KB Output is correct
4 Correct 98 ms 18832 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 75 ms 18596 KB Output is correct
7 Correct 18 ms 13012 KB Output is correct
8 Correct 74 ms 19112 KB Output is correct
9 Correct 69 ms 18636 KB Output is correct
10 Correct 90 ms 18832 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 70 ms 18604 KB Output is correct
13 Correct 66 ms 18636 KB Output is correct
14 Correct 65 ms 18660 KB Output is correct
15 Correct 84 ms 18596 KB Output is correct
16 Correct 87 ms 18756 KB Output is correct
17 Correct 89 ms 18696 KB Output is correct
18 Correct 83 ms 18524 KB Output is correct
19 Correct 8 ms 11988 KB Output is correct
20 Correct 9 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 21 ms 13040 KB Output is correct
23 Correct 73 ms 19188 KB Output is correct
24 Correct 69 ms 18672 KB Output is correct
25 Correct 89 ms 18820 KB Output is correct
26 Correct 8 ms 12152 KB Output is correct
27 Correct 73 ms 18616 KB Output is correct
28 Correct 70 ms 18728 KB Output is correct
29 Correct 74 ms 18636 KB Output is correct
30 Correct 75 ms 18540 KB Output is correct
31 Correct 73 ms 18760 KB Output is correct
32 Correct 66 ms 18636 KB Output is correct
33 Correct 70 ms 18600 KB Output is correct
34 Incorrect 1375 ms 61516 KB Output isn't correct
35 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 72 ms 19076 KB Output is correct
3 Correct 69 ms 18628 KB Output is correct
4 Correct 98 ms 18832 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 75 ms 18596 KB Output is correct
7 Correct 18 ms 13012 KB Output is correct
8 Correct 74 ms 19112 KB Output is correct
9 Correct 69 ms 18636 KB Output is correct
10 Correct 90 ms 18832 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 70 ms 18604 KB Output is correct
13 Correct 66 ms 18636 KB Output is correct
14 Correct 65 ms 18660 KB Output is correct
15 Correct 84 ms 18596 KB Output is correct
16 Correct 87 ms 18756 KB Output is correct
17 Correct 89 ms 18696 KB Output is correct
18 Correct 83 ms 18524 KB Output is correct
19 Correct 18 ms 12932 KB Output is correct
20 Correct 77 ms 19148 KB Output is correct
21 Correct 68 ms 18680 KB Output is correct
22 Correct 91 ms 18832 KB Output is correct
23 Correct 8 ms 12116 KB Output is correct
24 Correct 72 ms 18564 KB Output is correct
25 Correct 80 ms 18640 KB Output is correct
26 Correct 72 ms 18572 KB Output is correct
27 Correct 65 ms 18636 KB Output is correct
28 Correct 80 ms 18820 KB Output is correct
29 Correct 74 ms 18592 KB Output is correct
30 Correct 72 ms 18532 KB Output is correct
31 Correct 1360 ms 61516 KB Output is correct
32 Correct 1334 ms 66176 KB Output is correct
33 Correct 1260 ms 61968 KB Output is correct
34 Correct 1018 ms 65948 KB Output is correct
35 Execution timed out 6035 ms 56668 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 13012 KB Output is correct
2 Correct 72 ms 19076 KB Output is correct
3 Correct 69 ms 18628 KB Output is correct
4 Correct 98 ms 18832 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 75 ms 18596 KB Output is correct
7 Correct 18 ms 13012 KB Output is correct
8 Correct 74 ms 19112 KB Output is correct
9 Correct 69 ms 18636 KB Output is correct
10 Correct 90 ms 18832 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 70 ms 18604 KB Output is correct
13 Correct 66 ms 18636 KB Output is correct
14 Correct 65 ms 18660 KB Output is correct
15 Correct 84 ms 18596 KB Output is correct
16 Correct 87 ms 18756 KB Output is correct
17 Correct 89 ms 18696 KB Output is correct
18 Correct 83 ms 18524 KB Output is correct
19 Correct 18 ms 12932 KB Output is correct
20 Correct 77 ms 19148 KB Output is correct
21 Correct 68 ms 18680 KB Output is correct
22 Correct 91 ms 18832 KB Output is correct
23 Correct 8 ms 12116 KB Output is correct
24 Correct 72 ms 18564 KB Output is correct
25 Correct 80 ms 18640 KB Output is correct
26 Correct 72 ms 18572 KB Output is correct
27 Correct 65 ms 18636 KB Output is correct
28 Correct 80 ms 18820 KB Output is correct
29 Correct 74 ms 18592 KB Output is correct
30 Correct 72 ms 18532 KB Output is correct
31 Correct 1360 ms 61516 KB Output is correct
32 Correct 1334 ms 66176 KB Output is correct
33 Correct 1260 ms 61968 KB Output is correct
34 Correct 1018 ms 65948 KB Output is correct
35 Execution timed out 6035 ms 56668 KB Time limit exceeded
36 Halted 0 ms 0 KB -