oj.uz

Submission #583658

# Submission time Handle Problem Language Result Execution time Memory
583658 2022-06-25T22:13:27 Z tutis Event Hopping (BOI22_events) C++17
100 / 100
 113 ms 14024 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;
				while (true)
				{
					if (s >= S[t])
					{
						cout << a << "\n";
						break;
					}
					if (pa[t][0] == t)
					{
						cout << "impossible\n";
						break;
					}
					for (int i = 19; i >= 0; i--)
						if (s < S[pa[t][i]])
						{
							t = pa[t][i];
							a += (1 << i);
						}
					t = pa[t][0];
					a++;
				}
				// 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 71 ms 11672 KB Output is correct
3 Correct 88 ms 12132 KB Output is correct
4 Correct 98 ms 12140 KB Output is correct
5 Correct 77 ms 12004 KB Output is correct
6 Correct 83 ms 12184 KB Output is correct
7 Correct 81 ms 11864 KB Output is correct
8 Correct 62 ms 12776 KB Output is correct
9 Correct 73 ms 13004 KB Output is correct
10 Correct 111 ms 12724 KB Output is correct
11 Correct 89 ms 12312 KB Output is correct
12 Correct 62 ms 12116 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 0 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 0 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 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 31 ms 1316 KB Output is correct
20 Correct 26 ms 1364 KB Output is correct
21 Correct 31 ms 1556 KB Output is correct
22 Correct 25 ms 1564 KB Output is correct
23 Correct 24 ms 1364 KB Output is correct
24 Correct 19 ms 1364 KB Output is correct
25 Correct 25 ms 1132 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 0 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 1 ms 340 KB Output is correct
17 Correct 1 ms 408 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 53 ms 11072 KB Output is correct
20 Correct 40 ms 11096 KB Output is correct
21 Correct 43 ms 10436 KB Output is correct
22 Correct 41 ms 10832 KB Output is correct
23 Correct 38 ms 10448 KB Output is correct
24 Correct 47 ms 11212 KB Output is correct
25 Correct 41 ms 10440 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 11672 KB Output is correct
2 Correct 74 ms 11776 KB Output is correct
3 Correct 85 ms 11736 KB Output is correct
4 Correct 66 ms 12236 KB Output is correct
5 Correct 90 ms 12132 KB Output is correct
6 Correct 105 ms 11932 KB Output is correct
7 Correct 104 ms 11924 KB Output is correct
8 Correct 111 ms 11888 KB Output is correct
9 Correct 43 ms 10752 KB Output is correct
10 Correct 82 ms 11952 KB Output is correct
11 Correct 81 ms 11632 KB Output is correct
12 Correct 81 ms 11660 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 71 ms 11672 KB Output is correct
3 Correct 88 ms 12132 KB Output is correct
4 Correct 98 ms 12140 KB Output is correct
5 Correct 77 ms 12004 KB Output is correct
6 Correct 83 ms 12184 KB Output is correct
7 Correct 81 ms 11864 KB Output is correct
8 Correct 62 ms 12776 KB Output is correct
9 Correct 73 ms 13004 KB Output is correct
10 Correct 111 ms 12724 KB Output is correct
11 Correct 89 ms 12312 KB Output is correct
12 Correct 62 ms 12116 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 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 0 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 31 ms 1316 KB Output is correct
32 Correct 26 ms 1364 KB Output is correct
33 Correct 31 ms 1556 KB Output is correct
34 Correct 25 ms 1564 KB Output is correct
35 Correct 24 ms 1364 KB Output is correct
36 Correct 19 ms 1364 KB Output is correct
37 Correct 25 ms 1132 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 1 ms 340 KB Output is correct
45 Correct 1 ms 408 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 53 ms 11072 KB Output is correct
48 Correct 40 ms 11096 KB Output is correct
49 Correct 43 ms 10436 KB Output is correct
50 Correct 41 ms 10832 KB Output is correct
51 Correct 38 ms 10448 KB Output is correct
52 Correct 47 ms 11212 KB Output is correct
53 Correct 41 ms 10440 KB Output is correct
54 Correct 74 ms 11672 KB Output is correct
55 Correct 74 ms 11776 KB Output is correct
56 Correct 85 ms 11736 KB Output is correct
57 Correct 66 ms 12236 KB Output is correct
58 Correct 90 ms 12132 KB Output is correct
59 Correct 105 ms 11932 KB Output is correct
60 Correct 104 ms 11924 KB Output is correct
61 Correct 111 ms 11888 KB Output is correct
62 Correct 43 ms 10752 KB Output is correct
63 Correct 82 ms 11952 KB Output is correct
64 Correct 81 ms 11632 KB Output is correct
65 Correct 81 ms 11660 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 73 ms 11804 KB Output is correct
68 Correct 76 ms 12116 KB Output is correct
69 Correct 90 ms 11804 KB Output is correct
70 Correct 75 ms 12264 KB Output is correct
71 Correct 77 ms 11852 KB Output is correct
72 Correct 76 ms 12484 KB Output is correct
73 Correct 60 ms 12364 KB Output is correct
74 Correct 65 ms 12600 KB Output is correct
75 Correct 106 ms 12332 KB Output is correct
76 Correct 88 ms 11984 KB Output is correct
77 Correct 54 ms 12060 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 1 ms 340 KB Output is correct
80 Correct 1 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 332 KB Output is correct
84 Correct 1 ms 344 KB Output is correct
85 Correct 1 ms 340 KB Output is correct
86 Correct 36 ms 1400 KB Output is correct
87 Correct 29 ms 1376 KB Output is correct
88 Correct 32 ms 1712 KB Output is correct
89 Correct 31 ms 1704 KB Output is correct
90 Correct 41 ms 1520 KB Output is correct
91 Correct 21 ms 1484 KB Output is correct
92 Correct 27 ms 1172 KB Output is correct
93 Correct 52 ms 11364 KB Output is correct
94 Correct 49 ms 11216 KB Output is correct
95 Correct 49 ms 10580 KB Output is correct
96 Correct 44 ms 10952 KB Output is correct
97 Correct 41 ms 10936 KB Output is correct
98 Correct 53 ms 11228 KB Output is correct
99 Correct 37 ms 10544 KB Output is correct
100 Correct 104 ms 12056 KB Output is correct
101 Correct 102 ms 12408 KB Output is correct
102 Correct 97 ms 13172 KB Output is correct
103 Correct 71 ms 13304 KB Output is correct
104 Correct 69 ms 12316 KB Output is correct
105 Correct 76 ms 13416 KB Output is correct
106 Correct 89 ms 13580 KB Output is correct
107 Correct 113 ms 14024 KB Output is correct
108 Correct 76 ms 13164 KB Output is correct
109 Correct 82 ms 12648 KB Output is correct
110 Correct 82 ms 11752 KB Output is correct
111 Correct 87 ms 11552 KB Output is correct