oj.uz

Submission #583659

# Submission time Handle Problem Language Result Execution time Memory
583659 2022-06-25T22:15:50 Z tutis Event Hopping (BOI22_events) C++17
100 / 100
 111 ms 12108 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;
	vector<int>V;
	int pa[N][20];
	for (int j = 0; j < N; j++)
	{
		if (S[j] >= j)
		{
			pa[j][0] = j;
		}
		else
		{
			auto it = lower_bound(V.begin(), V.end(), S[j]);
			assert(it != V.end());
			pa[j][0] = *it;
		}
		for (int i = 1; i < 20; i++)
			pa[j][i] = pa[pa[j][i - 1]][i - 1];
		while (!V.empty() && S[V.back()] >= S[j])
			V.pop_back();
		V.push_back(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 {
				if (s >= t)
				{
					cout << "impossible\n";
					continue;
				}
				int a = 1;
				for (int i = 19; i >= 0; i--)
					if (s < S[pa[t][i]])
					{
						t = pa[t][i];
						a += (1 << i);
					}
				if (s < S[t])
				{
					t = pa[t][0];
					a++;
				}
				if (s >= S[t])
				{
					cout << a << "\n";
				}
				else
				{
					cout << "impossible\n";
				}
				// int k = D[t][s];
				// if (k > N)
				// 	cout << "impossible\n";
				// else
				// 	cout << k << "\n";
			}
		}
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 69 ms 11592 KB Output is correct
3 Correct 68 ms 11568 KB Output is correct
4 Correct 84 ms 11624 KB Output is correct
5 Correct 73 ms 11584 KB Output is correct
6 Correct 82 ms 11600 KB Output is correct
7 Correct 69 ms 11604 KB Output is correct
8 Correct 77 ms 12064 KB Output is correct
9 Correct 70 ms 12108 KB Output is correct
10 Correct 101 ms 11912 KB Output is correct
11 Correct 85 ms 11772 KB Output is correct
12 Correct 54 ms 11852 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 36 ms 1236 KB Output is correct
20 Correct 28 ms 1316 KB Output is correct
21 Correct 31 ms 1556 KB Output is correct
22 Correct 28 ms 1720 KB Output is correct
23 Correct 26 ms 1476 KB Output is correct
24 Correct 24 ms 1356 KB Output is correct
25 Correct 25 ms 1100 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 48 ms 11088 KB Output is correct
20 Correct 39 ms 11084 KB Output is correct
21 Correct 44 ms 10452 KB Output is correct
22 Correct 47 ms 10868 KB Output is correct
23 Correct 37 ms 10436 KB Output is correct
24 Correct 44 ms 11108 KB Output is correct
25 Correct 33 ms 10440 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 11580 KB Output is correct
2 Correct 71 ms 11516 KB Output is correct
3 Correct 76 ms 11592 KB Output is correct
4 Correct 64 ms 12092 KB Output is correct
5 Correct 97 ms 11848 KB Output is correct
6 Correct 101 ms 11704 KB Output is correct
7 Correct 104 ms 11668 KB Output is correct
8 Correct 83 ms 11632 KB Output is correct
9 Correct 36 ms 10444 KB Output is correct
10 Correct 71 ms 11364 KB Output is correct
11 Correct 65 ms 11104 KB Output is correct
12 Correct 70 ms 11340 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 69 ms 11592 KB Output is correct
3 Correct 68 ms 11568 KB Output is correct
4 Correct 84 ms 11624 KB Output is correct
5 Correct 73 ms 11584 KB Output is correct
6 Correct 82 ms 11600 KB Output is correct
7 Correct 69 ms 11604 KB Output is correct
8 Correct 77 ms 12064 KB Output is correct
9 Correct 70 ms 12108 KB Output is correct
10 Correct 101 ms 11912 KB Output is correct
11 Correct 85 ms 11772 KB Output is correct
12 Correct 54 ms 11852 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 36 ms 1236 KB Output is correct
32 Correct 28 ms 1316 KB Output is correct
33 Correct 31 ms 1556 KB Output is correct
34 Correct 28 ms 1720 KB Output is correct
35 Correct 26 ms 1476 KB Output is correct
36 Correct 24 ms 1356 KB Output is correct
37 Correct 25 ms 1100 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 2 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 48 ms 11088 KB Output is correct
48 Correct 39 ms 11084 KB Output is correct
49 Correct 44 ms 10452 KB Output is correct
50 Correct 47 ms 10868 KB Output is correct
51 Correct 37 ms 10436 KB Output is correct
52 Correct 44 ms 11108 KB Output is correct
53 Correct 33 ms 10440 KB Output is correct
54 Correct 92 ms 11580 KB Output is correct
55 Correct 71 ms 11516 KB Output is correct
56 Correct 76 ms 11592 KB Output is correct
57 Correct 64 ms 12092 KB Output is correct
58 Correct 97 ms 11848 KB Output is correct
59 Correct 101 ms 11704 KB Output is correct
60 Correct 104 ms 11668 KB Output is correct
61 Correct 83 ms 11632 KB Output is correct
62 Correct 36 ms 10444 KB Output is correct
63 Correct 71 ms 11364 KB Output is correct
64 Correct 65 ms 11104 KB Output is correct
65 Correct 70 ms 11340 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 69 ms 11592 KB Output is correct
68 Correct 68 ms 11548 KB Output is correct
69 Correct 76 ms 11488 KB Output is correct
70 Correct 73 ms 11552 KB Output is correct
71 Correct 74 ms 11616 KB Output is correct
72 Correct 70 ms 11596 KB Output is correct
73 Correct 66 ms 11996 KB Output is correct
74 Correct 64 ms 12060 KB Output is correct
75 Correct 100 ms 11848 KB Output is correct
76 Correct 89 ms 11808 KB Output is correct
77 Correct 54 ms 11856 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 1 ms 340 KB Output is correct
80 Correct 2 ms 340 KB Output is correct
81 Correct 1 ms 340 KB Output is correct
82 Correct 1 ms 340 KB Output is correct
83 Correct 1 ms 340 KB Output is correct
84 Correct 1 ms 340 KB Output is correct
85 Correct 1 ms 340 KB Output is correct
86 Correct 39 ms 1224 KB Output is correct
87 Correct 26 ms 1380 KB Output is correct
88 Correct 30 ms 1596 KB Output is correct
89 Correct 23 ms 1536 KB Output is correct
90 Correct 29 ms 1400 KB Output is correct
91 Correct 19 ms 1364 KB Output is correct
92 Correct 27 ms 1084 KB Output is correct
93 Correct 44 ms 11072 KB Output is correct
94 Correct 39 ms 11096 KB Output is correct
95 Correct 44 ms 10440 KB Output is correct
96 Correct 45 ms 10832 KB Output is correct
97 Correct 36 ms 10444 KB Output is correct
98 Correct 44 ms 11088 KB Output is correct
99 Correct 30 ms 10452 KB Output is correct
100 Correct 98 ms 11712 KB Output is correct
101 Correct 106 ms 11708 KB Output is correct
102 Correct 82 ms 11596 KB Output is correct
103 Correct 67 ms 11320 KB Output is correct
104 Correct 71 ms 11080 KB Output is correct
105 Correct 74 ms 11336 KB Output is correct
106 Correct 84 ms 11592 KB Output is correct
107 Correct 111 ms 11852 KB Output is correct
108 Correct 73 ms 11208 KB Output is correct
109 Correct 84 ms 11276 KB Output is correct
110 Correct 72 ms 11076 KB Output is correct
111 Correct 70 ms 11076 KB Output is correct