oj.uz

Submission #771746

# Submission time Handle Problem Language Result Execution time Memory
771746 2023-07-03T08:44:57 Z LittleCube From Hacks to Snitches (BOI21_watchmen) C++17
40 / 100
 6000 ms 281408 KB 
#include <bits/stdc++.h>
#define ll long long
#define state tuple<ll, int, int, int>
#define F first
#define S second
using namespace std;

int N, M, K, L, l[2500005], r[2500005], nxt[2500005];
vector<int> v[2000];
vector<ll> dis[2500005];
vector<bitset<1501>> vis[2500005];
vector<int> E[2500005];

bool good(int u, ll t)
{
	return r[u] == 0 || v[r[u]][t % l[r[u]]] != u;
}

bool goodmove(int u, int v, ll t)
{
	if (u == nxt[v])
		return good(u, t) && good(v, t);
	else
		return good(v, t);
}

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	cin >> N >> M;
	for (int i = 1; i <= M; i++)
	{
		int u, v;
		cin >> u >> v;
		E[u].emplace_back(v);
		E[v].emplace_back(u);
	}
	l[0] = 1;
	cin >> K;
	for (int i = 1; i <= K; i++)
	{
		cin >> l[i];
		L = max(L, l[i]);
		v[i].resize(l[i]);
		for (int j = 0; j < l[i]; j++)
		{
			cin >> v[i][j];
			r[v[i][j]] = i;
			vis[v[i][j]].resize(l[i]);
		}
		for (int j = 0; j < l[i]; j++)
			nxt[v[i][j]] = v[i][(j + 1) % l[i]];
	}
	for (int i = 1; i <= N; i++)
		dis[i].resize(l[r[i]], (ll)1e18);
	dis[1][0] = 0;
	priority_queue<state, vector<state>, greater<state>> pq;
	pq.push(state{0, 1, 0, 0});
	while (!pq.empty())
	{
		auto [d, u, k, b] = pq.top();
		pq.pop();
		if (!b && d > dis[u][k])
			continue;
		if (!b)
		{
			for (auto v : E[u])
				if (r[v] == 0 && d + 1 < dis[v][0])
				{
					dis[v][0] = d + 1;
					pq.push(state{d + 1, v, 0, 0});
				}
				else if (r[v])
				{
					if (!goodmove(u, v, d + 1) && l[r[u]] % l[r[v]] == 0)
						continue;
					pq.push(state{d, u, k, v});
				}

			int rem = (d + 1) % l[r[u]];
			if (good(u, d + 1) && dis[u][rem] > d + 1)
			{
				dis[u][rem] = d + 1;
				pq.push(state{d + 1, u, rem, 0});
			}
		}
		else
		{
			// u -> b
			int rem = (d + 1) % l[r[b]];
			if (vis[b][rem][l[r[u]]])
				continue;
			if (goodmove(u, b, d + 1))
			{
				vis[b][rem][l[r[u]]] = 1;
				if (dis[b][rem] > d + 1)
				{
					dis[b][rem] = d + 1;
					pq.push(state{d + 1, b, rem, 0});
				}
			}
			pq.push(state{d + l[r[u]], u, k, b});
		}
	}
	// for (int i = 1; i <= N; i++)
	// {
	// 	cout << i << ":";
	// 	for (auto j : dis[i])
	// 		cout << ' ' << j;
	// 	cout << '\n';
	// }
	if (dis[N][0] >= 1e18)
		cout << "impossible\n";
	else
		cout << dis[N][0] << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 359 ms 181480 KB Output is correct
2 Correct 132 ms 187956 KB Output is correct
3 Correct 136 ms 187312 KB Output is correct
4 Correct 396 ms 187552 KB Output is correct
5 Correct 87 ms 179896 KB Output is correct
6 Correct 135 ms 187404 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 181524 KB Output is correct
2 Correct 130 ms 187920 KB Output is correct
3 Correct 136 ms 187408 KB Output is correct
4 Correct 389 ms 187560 KB Output is correct
5 Correct 88 ms 179984 KB Output is correct
6 Correct 133 ms 187360 KB Output is correct
7 Correct 121 ms 185488 KB Output is correct
8 Correct 130 ms 185192 KB Output is correct
9 Correct 117 ms 184396 KB Output is correct
10 Correct 194 ms 185796 KB Output is correct
11 Correct 130 ms 184616 KB Output is correct
12 Correct 135 ms 185612 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 181524 KB Output is correct
2 Correct 130 ms 187920 KB Output is correct
3 Correct 136 ms 187408 KB Output is correct
4 Correct 389 ms 187560 KB Output is correct
5 Correct 88 ms 179984 KB Output is correct
6 Correct 133 ms 187360 KB Output is correct
7 Correct 121 ms 185488 KB Output is correct
8 Correct 130 ms 185192 KB Output is correct
9 Correct 117 ms 184396 KB Output is correct
10 Correct 194 ms 185796 KB Output is correct
11 Correct 130 ms 184616 KB Output is correct
12 Correct 135 ms 185612 KB Output is correct
13 Correct 355 ms 181524 KB Output is correct
14 Correct 137 ms 188032 KB Output is correct
15 Correct 140 ms 187408 KB Output is correct
16 Correct 396 ms 187484 KB Output is correct
17 Correct 86 ms 179960 KB Output is correct
18 Correct 141 ms 187380 KB Output is correct
19 Correct 146 ms 185552 KB Output is correct
20 Correct 118 ms 185072 KB Output is correct
21 Correct 116 ms 184408 KB Output is correct
22 Correct 201 ms 185776 KB Output is correct
23 Correct 130 ms 184612 KB Output is correct
24 Correct 127 ms 185592 KB Output is correct
25 Correct 1209 ms 274144 KB Output is correct
26 Correct 1121 ms 281408 KB Output is correct
27 Correct 1043 ms 272504 KB Output is correct
28 Correct 840 ms 270184 KB Output is correct
29 Execution timed out 6073 ms 267628 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 181524 KB Output is correct
2 Correct 130 ms 187920 KB Output is correct
3 Correct 136 ms 187408 KB Output is correct
4 Correct 389 ms 187560 KB Output is correct
5 Correct 88 ms 179984 KB Output is correct
6 Correct 133 ms 187360 KB Output is correct
7 Correct 121 ms 185488 KB Output is correct
8 Correct 130 ms 185192 KB Output is correct
9 Correct 117 ms 184396 KB Output is correct
10 Correct 194 ms 185796 KB Output is correct
11 Correct 130 ms 184616 KB Output is correct
12 Correct 135 ms 185612 KB Output is correct
13 Correct 355 ms 181524 KB Output is correct
14 Correct 137 ms 188032 KB Output is correct
15 Correct 140 ms 187408 KB Output is correct
16 Correct 396 ms 187484 KB Output is correct
17 Correct 86 ms 179960 KB Output is correct
18 Correct 141 ms 187380 KB Output is correct
19 Correct 146 ms 185552 KB Output is correct
20 Correct 118 ms 185072 KB Output is correct
21 Correct 116 ms 184408 KB Output is correct
22 Correct 201 ms 185776 KB Output is correct
23 Correct 130 ms 184612 KB Output is correct
24 Correct 127 ms 185592 KB Output is correct
25 Correct 1209 ms 274144 KB Output is correct
26 Correct 1121 ms 281408 KB Output is correct
27 Correct 1043 ms 272504 KB Output is correct
28 Correct 840 ms 270184 KB Output is correct
29 Execution timed out 6073 ms 267628 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 359 ms 181480 KB Output is correct
2 Correct 132 ms 187956 KB Output is correct
3 Correct 136 ms 187312 KB Output is correct
4 Correct 396 ms 187552 KB Output is correct
5 Correct 87 ms 179896 KB Output is correct
6 Correct 135 ms 187404 KB Output is correct
7 Correct 362 ms 181524 KB Output is correct
8 Correct 130 ms 187920 KB Output is correct
9 Correct 136 ms 187408 KB Output is correct
10 Correct 389 ms 187560 KB Output is correct
11 Correct 88 ms 179984 KB Output is correct
12 Correct 133 ms 187360 KB Output is correct
13 Correct 121 ms 185488 KB Output is correct
14 Correct 130 ms 185192 KB Output is correct
15 Correct 117 ms 184396 KB Output is correct
16 Correct 194 ms 185796 KB Output is correct
17 Correct 130 ms 184616 KB Output is correct
18 Correct 135 ms 185612 KB Output is correct
19 Correct 77 ms 176424 KB Output is correct
20 Correct 80 ms 176388 KB Output is correct
21 Correct 84 ms 176460 KB Output is correct
22 Correct 353 ms 181524 KB Output is correct
23 Correct 134 ms 187924 KB Output is correct
24 Correct 149 ms 187376 KB Output is correct
25 Correct 415 ms 187532 KB Output is correct
26 Correct 91 ms 179976 KB Output is correct
27 Correct 137 ms 187368 KB Output is correct
28 Correct 132 ms 185496 KB Output is correct
29 Correct 126 ms 185036 KB Output is correct
30 Correct 118 ms 184484 KB Output is correct
31 Correct 184 ms 185812 KB Output is correct
32 Correct 138 ms 184560 KB Output is correct
33 Correct 126 ms 185636 KB Output is correct
34 Correct 1136 ms 266340 KB Output is correct
35 Correct 1284 ms 262744 KB Output is correct
36 Correct 1212 ms 262752 KB Output is correct
37 Correct 1143 ms 267096 KB Output is correct
38 Correct 1126 ms 265440 KB Output is correct
39 Correct 5379 ms 263784 KB Output is correct
40 Correct 4342 ms 262872 KB Output is correct
41 Correct 2625 ms 262008 KB Output is correct
42 Correct 1296 ms 265036 KB Output is correct
43 Correct 1217 ms 269360 KB Output is correct
44 Correct 1286 ms 270640 KB Output is correct
45 Correct 1332 ms 265016 KB Output is correct
46 Correct 1151 ms 264448 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 359 ms 181480 KB Output is correct
2 Correct 132 ms 187956 KB Output is correct
3 Correct 136 ms 187312 KB Output is correct
4 Correct 396 ms 187552 KB Output is correct
5 Correct 87 ms 179896 KB Output is correct
6 Correct 135 ms 187404 KB Output is correct
7 Correct 362 ms 181524 KB Output is correct
8 Correct 130 ms 187920 KB Output is correct
9 Correct 136 ms 187408 KB Output is correct
10 Correct 389 ms 187560 KB Output is correct
11 Correct 88 ms 179984 KB Output is correct
12 Correct 133 ms 187360 KB Output is correct
13 Correct 121 ms 185488 KB Output is correct
14 Correct 130 ms 185192 KB Output is correct
15 Correct 117 ms 184396 KB Output is correct
16 Correct 194 ms 185796 KB Output is correct
17 Correct 130 ms 184616 KB Output is correct
18 Correct 135 ms 185612 KB Output is correct
19 Correct 355 ms 181524 KB Output is correct
20 Correct 137 ms 188032 KB Output is correct
21 Correct 140 ms 187408 KB Output is correct
22 Correct 396 ms 187484 KB Output is correct
23 Correct 86 ms 179960 KB Output is correct
24 Correct 141 ms 187380 KB Output is correct
25 Correct 146 ms 185552 KB Output is correct
26 Correct 118 ms 185072 KB Output is correct
27 Correct 116 ms 184408 KB Output is correct
28 Correct 201 ms 185776 KB Output is correct
29 Correct 130 ms 184612 KB Output is correct
30 Correct 127 ms 185592 KB Output is correct
31 Correct 1209 ms 274144 KB Output is correct
32 Correct 1121 ms 281408 KB Output is correct
33 Correct 1043 ms 272504 KB Output is correct
34 Correct 840 ms 270184 KB Output is correct
35 Execution timed out 6073 ms 267628 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 359 ms 181480 KB Output is correct
2 Correct 132 ms 187956 KB Output is correct
3 Correct 136 ms 187312 KB Output is correct
4 Correct 396 ms 187552 KB Output is correct
5 Correct 87 ms 179896 KB Output is correct
6 Correct 135 ms 187404 KB Output is correct
7 Correct 362 ms 181524 KB Output is correct
8 Correct 130 ms 187920 KB Output is correct
9 Correct 136 ms 187408 KB Output is correct
10 Correct 389 ms 187560 KB Output is correct
11 Correct 88 ms 179984 KB Output is correct
12 Correct 133 ms 187360 KB Output is correct
13 Correct 121 ms 185488 KB Output is correct
14 Correct 130 ms 185192 KB Output is correct
15 Correct 117 ms 184396 KB Output is correct
16 Correct 194 ms 185796 KB Output is correct
17 Correct 130 ms 184616 KB Output is correct
18 Correct 135 ms 185612 KB Output is correct
19 Correct 355 ms 181524 KB Output is correct
20 Correct 137 ms 188032 KB Output is correct
21 Correct 140 ms 187408 KB Output is correct
22 Correct 396 ms 187484 KB Output is correct
23 Correct 86 ms 179960 KB Output is correct
24 Correct 141 ms 187380 KB Output is correct
25 Correct 146 ms 185552 KB Output is correct
26 Correct 118 ms 185072 KB Output is correct
27 Correct 116 ms 184408 KB Output is correct
28 Correct 201 ms 185776 KB Output is correct
29 Correct 130 ms 184612 KB Output is correct
30 Correct 127 ms 185592 KB Output is correct
31 Correct 1209 ms 274144 KB Output is correct
32 Correct 1121 ms 281408 KB Output is correct
33 Correct 1043 ms 272504 KB Output is correct
34 Correct 840 ms 270184 KB Output is correct
35 Execution timed out 6073 ms 267628 KB Time limit exceeded
36 Halted 0 ms 0 KB -