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Submission #673665

# Submission time Handle Problem Language Result Execution time Memory
673665 2022-12-21T15:27:17 Z stanislavpolyn From Hacks to Snitches (BOI21_watchmen) C++17
15 / 100
 6000 ms 114272 KB 
#include <bits/stdc++.h>
 
#pragma GCC optimize("O3")
 
#define fr(i, a, b) for (int i = (a); i <= (b); ++i)
#define rf(i, a, b) for (int i = (a); i >= (b); --i)
#define fe(x, y) for (auto& x : y)
 
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define mt make_tuple
 
#define all(x) (x).begin(), (x).end()
#define pw(x) (1LL << (x))
#define sz(x) (int)(x).size()
 
using namespace std;
 
mt19937_64 rng(228);
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <typename T>
using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define fbo find_by_order
#define ook order_of_key
 
template <typename T>
bool umn(T& a, T b) { return (a > b ? (a = b, 1) : 0); }
template <typename T>
bool umx(T& a, T b) { return (a < b ? (a = b, 1) : 0); }
 
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template <typename T>
using ve = vector<T>;
 
const int N = 3e5 + 5;
 
int n, m, k;
ve<int> g[N];
ve<int> v[N];
bool mark[N];
 
ve<int> dp[N];
int bad[N];
int nxt[N];
queue<array<int, 3>> q;
 
int main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    ios::sync_with_stdio(0);
    cin.tie(0);
#endif
 
    cin >> n >> m;
 
    fr (i, 1, m) {
        int a, b;
        cin >> a >> b;
        g[a].pb(b);
        g[b].pb(a);
    }
    cin >> k;
    fr (i, 1, k) {
        int sz;
        cin >> sz;
        v[i].resize(sz);
        int idx = 0;
 
        int prv = -1;
        fe (x, v[i]) {
            cin >> x;
            if (prv != -1) nxt[prv] = x;
            prv = x;
            assert(!mark[x]);
            mark[x] = 1;
            dp[x].resize(sz, 1e9);
            bad[x] = idx;
            idx++;
        }
        nxt[v[i].back()] = v[i][0];
    }
 
    fr (i, 1, n) {
        if (!mark[i]) {
            dp[i].resize(2, 1e9);
            bad[i] = -1;
            nxt[i] = -1;
        }
    }
 
    assert(!mark[1]);
    assert(!mark[n]);
//    assert(k == 1);
 
    dp[1][0] = 0;
    q.push({0, 1, 0});
 
//    fr (i, 1, n) {
//        cout << i << " " << bad[i] << "\n";
//    }
 
    while (sz(q)) {
        int v = (q.front())[1];
        int rem = (q.front())[2];
        int t = (q.front())[0];
        q.pop();
        assert(dp[v][rem] == t);
        assert(rem == t % sz(dp[v]));
 
        int nt = (t + 1) % sz(dp[v]);
 
        bool good = 0;
        fe (to, g[v]) {
            if (!mark[to] && min(dp[to][0], dp[to][1]) < t) {
                good = 1;
                break;
            }
        }
 
        if (bad[v] != nt || good) {
            if (dp[v][nt] > t + 1) {
                dp[v][nt] = t + 1;
                q.push({dp[v][nt], v, nt});
            }
        }
 
        if (rem == bad[v]) continue;
 
        fe (to, g[v]) {
            int nt = (t + 1) % sz(dp[to]);
            if (bad[to] == nt) continue;
            if ((t + 1) % sz(dp[v]) == bad[v] && nxt[to] == v) continue;
 
            if (to == n) {
                cout << t + 1 << "\n";
                return 0;
            }
 
 
            if (dp[to][nt] > t + 1) {
                dp[to][nt] = t + 1;
                q.push({dp[to][nt], to, nt});
            }
        }
    }
 
    int mn = *min_element(all(dp[n]));
 
    if (mn == int(1e9)) {
        cout << "impossible\n";
        return 0;
    }
 
 
 
    cout << mn << "\n";
 
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 22988 KB Output is correct
2 Correct 100 ms 29748 KB Output is correct
3 Correct 96 ms 29196 KB Output is correct
4 Correct 100 ms 29284 KB Output is correct
5 Correct 12 ms 21552 KB Output is correct
6 Correct 83 ms 29236 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23008 KB Output is correct
2 Correct 82 ms 29820 KB Output is correct
3 Correct 74 ms 29232 KB Output is correct
4 Correct 108 ms 29260 KB Output is correct
5 Correct 13 ms 21460 KB Output is correct
6 Correct 89 ms 29272 KB Output is correct
7 Correct 97 ms 29260 KB Output is correct
8 Correct 74 ms 29184 KB Output is correct
9 Correct 80 ms 29132 KB Output is correct
10 Correct 94 ms 29260 KB Output is correct
11 Correct 84 ms 29156 KB Output is correct
12 Correct 85 ms 29196 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23008 KB Output is correct
2 Correct 82 ms 29820 KB Output is correct
3 Correct 74 ms 29232 KB Output is correct
4 Correct 108 ms 29260 KB Output is correct
5 Correct 13 ms 21460 KB Output is correct
6 Correct 89 ms 29272 KB Output is correct
7 Correct 97 ms 29260 KB Output is correct
8 Correct 74 ms 29184 KB Output is correct
9 Correct 80 ms 29132 KB Output is correct
10 Correct 94 ms 29260 KB Output is correct
11 Correct 84 ms 29156 KB Output is correct
12 Correct 85 ms 29196 KB Output is correct
13 Correct 24 ms 22996 KB Output is correct
14 Correct 87 ms 29812 KB Output is correct
15 Correct 78 ms 29272 KB Output is correct
16 Correct 124 ms 29340 KB Output is correct
17 Correct 13 ms 21540 KB Output is correct
18 Correct 80 ms 29248 KB Output is correct
19 Correct 99 ms 29156 KB Output is correct
20 Correct 83 ms 29192 KB Output is correct
21 Correct 82 ms 29132 KB Output is correct
22 Correct 84 ms 29264 KB Output is correct
23 Correct 74 ms 29152 KB Output is correct
24 Correct 94 ms 29132 KB Output is correct
25 Correct 1761 ms 110620 KB Output is correct
26 Correct 1638 ms 114272 KB Output is correct
27 Correct 1674 ms 110060 KB Output is correct
28 Correct 1170 ms 114024 KB Output is correct
29 Execution timed out 6022 ms 107260 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23008 KB Output is correct
2 Correct 82 ms 29820 KB Output is correct
3 Correct 74 ms 29232 KB Output is correct
4 Correct 108 ms 29260 KB Output is correct
5 Correct 13 ms 21460 KB Output is correct
6 Correct 89 ms 29272 KB Output is correct
7 Correct 97 ms 29260 KB Output is correct
8 Correct 74 ms 29184 KB Output is correct
9 Correct 80 ms 29132 KB Output is correct
10 Correct 94 ms 29260 KB Output is correct
11 Correct 84 ms 29156 KB Output is correct
12 Correct 85 ms 29196 KB Output is correct
13 Correct 24 ms 22996 KB Output is correct
14 Correct 87 ms 29812 KB Output is correct
15 Correct 78 ms 29272 KB Output is correct
16 Correct 124 ms 29340 KB Output is correct
17 Correct 13 ms 21540 KB Output is correct
18 Correct 80 ms 29248 KB Output is correct
19 Correct 99 ms 29156 KB Output is correct
20 Correct 83 ms 29192 KB Output is correct
21 Correct 82 ms 29132 KB Output is correct
22 Correct 84 ms 29264 KB Output is correct
23 Correct 74 ms 29152 KB Output is correct
24 Correct 94 ms 29132 KB Output is correct
25 Correct 1761 ms 110620 KB Output is correct
26 Correct 1638 ms 114272 KB Output is correct
27 Correct 1674 ms 110060 KB Output is correct
28 Correct 1170 ms 114024 KB Output is correct
29 Execution timed out 6022 ms 107260 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 22988 KB Output is correct
2 Correct 100 ms 29748 KB Output is correct
3 Correct 96 ms 29196 KB Output is correct
4 Correct 100 ms 29284 KB Output is correct
5 Correct 12 ms 21552 KB Output is correct
6 Correct 83 ms 29236 KB Output is correct
7 Correct 23 ms 23008 KB Output is correct
8 Correct 82 ms 29820 KB Output is correct
9 Correct 74 ms 29232 KB Output is correct
10 Correct 108 ms 29260 KB Output is correct
11 Correct 13 ms 21460 KB Output is correct
12 Correct 89 ms 29272 KB Output is correct
13 Correct 97 ms 29260 KB Output is correct
14 Correct 74 ms 29184 KB Output is correct
15 Correct 80 ms 29132 KB Output is correct
16 Correct 94 ms 29260 KB Output is correct
17 Correct 84 ms 29156 KB Output is correct
18 Correct 85 ms 29196 KB Output is correct
19 Correct 11 ms 21460 KB Output is correct
20 Correct 11 ms 21460 KB Output is correct
21 Correct 12 ms 21460 KB Output is correct
22 Correct 21 ms 22944 KB Output is correct
23 Correct 97 ms 29824 KB Output is correct
24 Correct 78 ms 29160 KB Output is correct
25 Correct 113 ms 29236 KB Output is correct
26 Correct 12 ms 21548 KB Output is correct
27 Correct 81 ms 29244 KB Output is correct
28 Correct 70 ms 29188 KB Output is correct
29 Correct 85 ms 29216 KB Output is correct
30 Correct 98 ms 29128 KB Output is correct
31 Correct 82 ms 29260 KB Output is correct
32 Correct 73 ms 29252 KB Output is correct
33 Correct 76 ms 29160 KB Output is correct
34 Correct 1797 ms 111056 KB Output is correct
35 Correct 1842 ms 107812 KB Output is correct
36 Correct 1911 ms 107784 KB Output is correct
37 Incorrect 1544 ms 112644 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 22988 KB Output is correct
2 Correct 100 ms 29748 KB Output is correct
3 Correct 96 ms 29196 KB Output is correct
4 Correct 100 ms 29284 KB Output is correct
5 Correct 12 ms 21552 KB Output is correct
6 Correct 83 ms 29236 KB Output is correct
7 Correct 23 ms 23008 KB Output is correct
8 Correct 82 ms 29820 KB Output is correct
9 Correct 74 ms 29232 KB Output is correct
10 Correct 108 ms 29260 KB Output is correct
11 Correct 13 ms 21460 KB Output is correct
12 Correct 89 ms 29272 KB Output is correct
13 Correct 97 ms 29260 KB Output is correct
14 Correct 74 ms 29184 KB Output is correct
15 Correct 80 ms 29132 KB Output is correct
16 Correct 94 ms 29260 KB Output is correct
17 Correct 84 ms 29156 KB Output is correct
18 Correct 85 ms 29196 KB Output is correct
19 Correct 24 ms 22996 KB Output is correct
20 Correct 87 ms 29812 KB Output is correct
21 Correct 78 ms 29272 KB Output is correct
22 Correct 124 ms 29340 KB Output is correct
23 Correct 13 ms 21540 KB Output is correct
24 Correct 80 ms 29248 KB Output is correct
25 Correct 99 ms 29156 KB Output is correct
26 Correct 83 ms 29192 KB Output is correct
27 Correct 82 ms 29132 KB Output is correct
28 Correct 84 ms 29264 KB Output is correct
29 Correct 74 ms 29152 KB Output is correct
30 Correct 94 ms 29132 KB Output is correct
31 Correct 1761 ms 110620 KB Output is correct
32 Correct 1638 ms 114272 KB Output is correct
33 Correct 1674 ms 110060 KB Output is correct
34 Correct 1170 ms 114024 KB Output is correct
35 Execution timed out 6022 ms 107260 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 22988 KB Output is correct
2 Correct 100 ms 29748 KB Output is correct
3 Correct 96 ms 29196 KB Output is correct
4 Correct 100 ms 29284 KB Output is correct
5 Correct 12 ms 21552 KB Output is correct
6 Correct 83 ms 29236 KB Output is correct
7 Correct 23 ms 23008 KB Output is correct
8 Correct 82 ms 29820 KB Output is correct
9 Correct 74 ms 29232 KB Output is correct
10 Correct 108 ms 29260 KB Output is correct
11 Correct 13 ms 21460 KB Output is correct
12 Correct 89 ms 29272 KB Output is correct
13 Correct 97 ms 29260 KB Output is correct
14 Correct 74 ms 29184 KB Output is correct
15 Correct 80 ms 29132 KB Output is correct
16 Correct 94 ms 29260 KB Output is correct
17 Correct 84 ms 29156 KB Output is correct
18 Correct 85 ms 29196 KB Output is correct
19 Correct 24 ms 22996 KB Output is correct
20 Correct 87 ms 29812 KB Output is correct
21 Correct 78 ms 29272 KB Output is correct
22 Correct 124 ms 29340 KB Output is correct
23 Correct 13 ms 21540 KB Output is correct
24 Correct 80 ms 29248 KB Output is correct
25 Correct 99 ms 29156 KB Output is correct
26 Correct 83 ms 29192 KB Output is correct
27 Correct 82 ms 29132 KB Output is correct
28 Correct 84 ms 29264 KB Output is correct
29 Correct 74 ms 29152 KB Output is correct
30 Correct 94 ms 29132 KB Output is correct
31 Correct 1761 ms 110620 KB Output is correct
32 Correct 1638 ms 114272 KB Output is correct
33 Correct 1674 ms 110060 KB Output is correct
34 Correct 1170 ms 114024 KB Output is correct
35 Execution timed out 6022 ms 107260 KB Time limit exceeded
36 Halted 0 ms 0 KB -