oj.uz

Submission #771860

# Submission time Handle Problem Language Result Execution time Memory
771860 2023-07-03T10:36:48 Z LittleCube Inside information (BOI21_servers) C++17
50 / 100
 340 ms 51484 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define piii tuple<int, int, int>
#define F first
#define S second
using namespace std;

int N, K, pre[120005][20], ts;
pii io[120005], bin[120005][20], e[120005];
piii Q[120005];
vector<pii> E[120005];

const pii no = {-1, -1}, bad = {-2, -2};
pii merge(pii p, pii q)
{
	if (p == no)
		return q;
	if (q == no)
		return p;
	if (p == bad || q == bad)
		return bad;
	if (p.F <= p.S && p.S <= q.F && q.F <= q.S)
		return pii(p.F, q.S);
	if (p.F >= p.S && p.S >= q.F && q.F >= q.S)
		return pii(p.F, q.S);
	return bad;
}

void dfs(int u)
{
	io[u].F = ++ts;
	for (auto [v, w] : E[u])
		if (v != pre[u][0])
		{
			pre[v][0] = u;
			bin[v][0] = pii(w, w);
			for (int p = 0; p + 1 < 20; p++)
				pre[v][p + 1] = pre[pre[v][p]][p],
						   bin[v][p + 1] = merge(bin[v][p], bin[pre[v][p]][p]);
			dfs(v);
		}
	io[u].S = ts;
}

bool ischild(int r, int c)
{
	return io[r].F <= io[c].F && io[c].S <= io[r].S;
}

signed main()
{
	cin >> N >> K;
	for (int i = 0, j = 0; i + j < K + N - 1;)
	{
		char c;
		int a, b = 0;
		cin >> c >> a;
		if (c != 'C')
			cin >> b;

		if (c == 'S')
		{
			j++;
			e[j] = pii(a, b);
			E[a].emplace_back(pii(b, j));
			E[b].emplace_back(pii(a, j));
		}
		else
		{
			i++;
			Q[i] = piii(j, a, b);
		}
	}
	for (int p = 0; p < 20; p++)
		pre[1][p] = 1, bin[1][p] = no;
	dfs(1);

	for (int i = 1; i <= K; i++)
	{
		auto [t, a, b] = Q[i];
		if (b > 0)
		{
			int u = a, v = b;
			pii l = no, r = no;

			for (int p = 19; p >= 0; p--)
				if (!ischild(pre[u][p], v))
					l = merge(l, bin[u][p]), u = pre[u][p];
			if (!ischild(u, v))
				l = merge(l, bin[u][0]), u = pre[u][0];
			
			for (int p = 19; p >= 0; p--)
				if (!ischild(pre[v][p], u))
					r = merge(r, bin[v][p]), v = pre[v][p];
			if (!ischild(v, u))
				r = merge(r, bin[v][0]), v = pre[v][0];

			swap(r.F, r.S);

			// cerr << merge(l, r).F << ' ' << merge(l, r).S << '\n';
			l = merge(merge(pii(t, t), merge(l, r)), pii(0, 0));
			cout << (l != bad ? "yes\n" : "no\n");
		}
	}
}

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 54 ms 5812 KB Output is correct
2 Correct 98 ms 7372 KB Output is correct
3 Correct 73 ms 7396 KB Output is correct
4 Correct 86 ms 7484 KB Output is correct
5 Correct 78 ms 7604 KB Output is correct
6 Correct 61 ms 7400 KB Output is correct

Subtask #2
0 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 54 ms 5812 KB Output is correct
2 Correct 98 ms 7372 KB Output is correct
3 Correct 73 ms 7396 KB Output is correct
4 Correct 86 ms 7484 KB Output is correct
5 Correct 78 ms 7604 KB Output is correct
6 Correct 61 ms 7400 KB Output is correct
7 Incorrect 50 ms 5700 KB Extra information in the output file
8 Halted 0 ms 0 KB -

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 60 ms 5840 KB Output is correct
2 Correct 216 ms 42524 KB Output is correct
3 Correct 195 ms 42488 KB Output is correct

Subtask #4
0 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 60 ms 5840 KB Output is correct
2 Correct 216 ms 42524 KB Output is correct
3 Correct 195 ms 42488 KB Output is correct
4 Incorrect 46 ms 5720 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 5700 KB Output is correct
2 Correct 227 ms 51484 KB Output is correct
3 Correct 218 ms 51408 KB Output is correct
4 Correct 214 ms 51324 KB Output is correct

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 5700 KB Output is correct
2 Correct 227 ms 51484 KB Output is correct
3 Correct 218 ms 51408 KB Output is correct
4 Correct 214 ms 51324 KB Output is correct
5 Incorrect 68 ms 5708 KB Extra information in the output file
6 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 5716 KB Output is correct
2 Correct 232 ms 42860 KB Output is correct
3 Correct 186 ms 43380 KB Output is correct

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 5716 KB Output is correct
2 Correct 232 ms 42860 KB Output is correct
3 Correct 186 ms 43380 KB Output is correct
4 Incorrect 55 ms 5660 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 63 ms 5836 KB Output is correct
2 Correct 209 ms 51408 KB Output is correct
3 Correct 195 ms 51396 KB Output is correct
4 Correct 218 ms 51344 KB Output is correct
5 Correct 62 ms 5768 KB Output is correct
6 Correct 219 ms 42916 KB Output is correct
7 Correct 235 ms 43396 KB Output is correct
8 Correct 236 ms 43784 KB Output is correct
9 Correct 212 ms 43796 KB Output is correct
10 Correct 241 ms 48256 KB Output is correct
11 Correct 340 ms 47568 KB Output is correct

Subtask #10
0 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 63 ms 5836 KB Output is correct
2 Correct 209 ms 51408 KB Output is correct
3 Correct 195 ms 51396 KB Output is correct
4 Correct 218 ms 51344 KB Output is correct
5 Correct 62 ms 5768 KB Output is correct
6 Correct 219 ms 42916 KB Output is correct
7 Correct 235 ms 43396 KB Output is correct
8 Correct 236 ms 43784 KB Output is correct
9 Correct 212 ms 43796 KB Output is correct
10 Correct 241 ms 48256 KB Output is correct
11 Correct 340 ms 47568 KB Output is correct
12 Incorrect 53 ms 5676 KB Extra information in the output file
13 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 52 ms 5696 KB Output is correct
2 Correct 69 ms 7340 KB Output is correct
3 Correct 61 ms 7452 KB Output is correct
4 Correct 83 ms 7576 KB Output is correct
5 Correct 99 ms 7664 KB Output is correct
6 Correct 61 ms 7484 KB Output is correct
7 Correct 47 ms 5836 KB Output is correct
8 Correct 183 ms 42544 KB Output is correct
9 Correct 181 ms 42484 KB Output is correct
10 Correct 51 ms 5728 KB Output is correct
11 Correct 286 ms 51428 KB Output is correct
12 Correct 211 ms 51476 KB Output is correct
13 Correct 244 ms 51348 KB Output is correct
14 Correct 58 ms 5804 KB Output is correct
15 Correct 215 ms 42852 KB Output is correct
16 Correct 215 ms 43372 KB Output is correct
17 Correct 263 ms 43776 KB Output is correct
18 Correct 225 ms 43816 KB Output is correct
19 Correct 263 ms 48364 KB Output is correct
20 Correct 317 ms 47604 KB Output is correct
21 Correct 256 ms 43068 KB Output is correct
22 Correct 222 ms 43044 KB Output is correct
23 Correct 228 ms 43336 KB Output is correct
24 Correct 213 ms 43420 KB Output is correct
25 Correct 239 ms 45108 KB Output is correct
26 Correct 248 ms 42868 KB Output is correct
27 Correct 201 ms 42880 KB Output is correct

Subtask #12
0 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 52 ms 5696 KB Output is correct
2 Correct 69 ms 7340 KB Output is correct
3 Correct 61 ms 7452 KB Output is correct
4 Correct 83 ms 7576 KB Output is correct
5 Correct 99 ms 7664 KB Output is correct
6 Correct 61 ms 7484 KB Output is correct
7 Correct 47 ms 5836 KB Output is correct
8 Correct 183 ms 42544 KB Output is correct
9 Correct 181 ms 42484 KB Output is correct
10 Correct 51 ms 5728 KB Output is correct
11 Correct 286 ms 51428 KB Output is correct
12 Correct 211 ms 51476 KB Output is correct
13 Correct 244 ms 51348 KB Output is correct
14 Correct 58 ms 5804 KB Output is correct
15 Correct 215 ms 42852 KB Output is correct
16 Correct 215 ms 43372 KB Output is correct
17 Correct 263 ms 43776 KB Output is correct
18 Correct 225 ms 43816 KB Output is correct
19 Correct 263 ms 48364 KB Output is correct
20 Correct 317 ms 47604 KB Output is correct
21 Correct 256 ms 43068 KB Output is correct
22 Correct 222 ms 43044 KB Output is correct
23 Correct 228 ms 43336 KB Output is correct
24 Correct 213 ms 43420 KB Output is correct
25 Correct 239 ms 45108 KB Output is correct
26 Correct 248 ms 42868 KB Output is correct
27 Correct 201 ms 42880 KB Output is correct
28 Incorrect 75 ms 5692 KB Extra information in the output file
29 Halted 0 ms 0 KB -