답안 #583659

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
583659	2022-06-25T22:15:50 Z	tutis	Event Hopping (BOI22_events)	C++17	100 / 100	111 ms	12108 KB

events

/*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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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