oj.uz

Submission #583649

# Submission time Handle Problem Language Result Execution time Memory
583649 2022-06-25T21:20:40 Z tutis Event Hopping (BOI22_events) C++17
10 / 100
 1500 ms 524288 KB 
/*input
8 5
1 2
3 4
1 5
6 7
5 10
10 20
15 20
999999999 1000000000
1 6
1 7
2 4
3 3
5 8
*/
#include <bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int N, Q;
	cin >> N >> Q;
	pair<pair<int, int>, int>A[N];
	for (int i = 0; i < N; i++)
	{
		cin >> A[i].first.second >> A[i].first.first;
		A[i].second = i;
	}
	sort(A, A + N);
	int p[N];
	for (int i = 0; i < N; i++)
		p[A[i].second] = i;
	int S[N], E[N];
	for (int i = 0; i < N; i++)
	{
		S[i] = A[i].first.second;
		E[i] = A[i].first.first;
	}
	for (int i = 0; i < N; i++)
	{
		S[i] = (lower_bound(E, E + N, S[i]) - E);
	}
	int D[N][N];
	for (int i = 0; i < N; i++)
		for (int j = 0; j < N; j++)
			D[i][j] = N + 10;
	for (int i = N - 1; i >= 0; i--)
	{
		D[i][i] = 0;
		for (int j = i + 1; j < N; j++)
		{
			if (S[j] <= i)
				D[i][j] = 1;
			else
			{
				for (int k = i + 1; k < j; k++)
					D[i][j] = min(D[i][j], D[i][k] + D[k][j]);
			}
		}
	}
	while (Q--)
	{
		int s, t;
		cin >> s >> t;
		s = p[s - 1];
		t = p[t - 1];
		if (s == t)
		{
			cout << "0\n";
		}
		else {
			if (A[t].first.second <= A[s].first.first && A[s].first.first <= A[t].first.first)
				cout << "1\n";
			else {
				int k = D[s][t];
				if (k > N)
					cout << "impossible\n";
				else
					cout << k << "\n";
			}
		}
	}
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 238 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 275 ms 4228 KB Output is correct
4 Correct 329 ms 4232 KB Output is correct
5 Correct 294 ms 4232 KB Output is correct
6 Correct 196 ms 4232 KB Output is correct
7 Correct 174 ms 4232 KB Output is correct
8 Correct 3 ms 4180 KB Output is correct
9 Correct 3 ms 4180 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 275 ms 4228 KB Output is correct
4 Correct 329 ms 4232 KB Output is correct
5 Correct 294 ms 4232 KB Output is correct
6 Correct 196 ms 4232 KB Output is correct
7 Correct 174 ms 4232 KB Output is correct
8 Correct 3 ms 4180 KB Output is correct
9 Correct 3 ms 4180 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 265 ms 4232 KB Output is correct
13 Correct 292 ms 4232 KB Output is correct
14 Correct 275 ms 4228 KB Output is correct
15 Correct 191 ms 4232 KB Output is correct
16 Correct 145 ms 4240 KB Output is correct
17 Correct 5 ms 4180 KB Output is correct
18 Correct 3 ms 4180 KB Output is correct
19 Execution timed out 1564 ms 98252 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 275 ms 4228 KB Output is correct
4 Correct 329 ms 4232 KB Output is correct
5 Correct 294 ms 4232 KB Output is correct
6 Correct 196 ms 4232 KB Output is correct
7 Correct 174 ms 4232 KB Output is correct
8 Correct 3 ms 4180 KB Output is correct
9 Correct 3 ms 4180 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 308 ms 4236 KB Output is correct
13 Correct 296 ms 4236 KB Output is correct
14 Correct 292 ms 4228 KB Output is correct
15 Correct 217 ms 4232 KB Output is correct
16 Correct 186 ms 4232 KB Output is correct
17 Correct 3 ms 4180 KB Output is correct
18 Correct 3 ms 4180 KB Output is correct
19 Runtime error 241 ms 524288 KB Execution killed with signal 9
20 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 237 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 238 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -