oj.uz

Submission #672068

# Submission time Handle Problem Language Result Execution time Memory
672068 2022-12-14T16:51:58 Z LittleCube Event Hopping (BOI22_events) C++14
100 / 100
 202 ms 21096 KB 
#include <bits/stdc++.h>
#define ll long long 
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;

const int P = 17;
int N;

struct sparse
{
	int table[P][100005];
	void build(int arr[])
	{
		for(int i = 1; i <= N; i++)
			table[0][i] = arr[i];
		for(int p = 0; p + 1 < P; p++)
			for(int i = 1; i <= N - (1 << p); i++)
				table[p + 1][i] = min(table[p][i], table[p][i + (1 << p)]);
	}
	int query(int l, int r)
	{
		int p = __lg(r - l + 1);
		return min(table[p][l], table[p][r - (1 << p) + 1]);
	}
}st;

int Q, rk[100005], order[100005], table[20][100005], last[100005], ans[100005], start[100005];
pii p[100005], range[100005];

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);

	cin >> N >> Q;
	for(int i = 1; i <= N; i++)
		cin >> p[i].F >> p[i].S;
	for(int i = 1; i <= N; i++)
		rk[i] = i;
	sort(rk + 1, rk + 1 + N, [&](int i, int j){return p[i].S < p[j].S;});
	for(int i = 1; i <= N; i++)
		order[rk[i]] = i;
	sort(p + 1, p + 1 + N, [&](pii i, pii j){return i.S < j.S; });

	for(int i = 1; i <= N; i++)
		table[0][i] = lower_bound(p + 1, p + 1 + N, pii(0, p[i].F), [](pii i, pii j){return i.S < j.S; }) - p;
	for(int i = 1; i <= N; i++)
		last[i] = upper_bound(p + 1, p + 1 + N, pii(0, p[i].S), [](pii i, pii j){return i.S < j.S; }) - p - 1;
	for(int p = 0; p + 1 < P; p++)
	{
		st.build(table[p]);
		for(int i = 1; i <= N; i++)
			table[p + 1][i] = st.query(table[p][i], last[i]);
	}
	// for(int p = 0; p < P; p++)
	// 	for(int i = 1; i <= N; i++)
	//		cout << table[p][i] << " \n"[i == N];
	
	for(int i = 1; i <= Q; i++)
	{
		int u, v;
		cin >> u >> v;
		if(u == v) ans[i] = -1;
		start[i] = order[u];
		range[i] = pii(order[v], order[v]);
	}
	for(int p = P - 1; p >= 0; p--)
	{
		st.build(table[p]);
		for(int i = 1; i <= Q; i++)
		{
			pii nrange = pii(st.query(range[i].F, range[i].S), last[range[i].S]);
			// if(i == 1 || i == 2) cout << "query " << i << " " << p << " range " << range[i].F << " " << range[i].S << " -> " << nrange.F << " " << nrange.S << '\n';
			if(start[i] < nrange.F || nrange.S < start[i])
			{
				ans[i] += (1 << p);
				range[i] = nrange;
			}
		}
	}
	for(int i = 1; i <= Q; i++)
		if(ans[i] >= N)
			cout << "impossible\n";
		else cout << ans[i] + 1 << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 142 ms 20576 KB Output is correct
3 Correct 133 ms 20596 KB Output is correct
4 Correct 150 ms 20568 KB Output is correct
5 Correct 151 ms 20664 KB Output is correct
6 Correct 139 ms 20612 KB Output is correct
7 Correct 146 ms 20636 KB Output is correct
8 Correct 137 ms 21004 KB Output is correct
9 Correct 153 ms 21068 KB Output is correct
10 Correct 155 ms 20924 KB Output is correct
11 Correct 169 ms 20940 KB Output is correct
12 Correct 145 ms 20264 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 632 KB Output is correct
4 Correct 2 ms 608 KB Output is correct
5 Correct 2 ms 592 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 1 ms 596 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 632 KB Output is correct
4 Correct 2 ms 608 KB Output is correct
5 Correct 2 ms 592 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 58 ms 4172 KB Output is correct
20 Correct 36 ms 4172 KB Output is correct
21 Correct 44 ms 4428 KB Output is correct
22 Correct 43 ms 4520 KB Output is correct
23 Correct 50 ms 4396 KB Output is correct
24 Correct 47 ms 4392 KB Output is correct
25 Correct 33 ms 3988 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 632 KB Output is correct
4 Correct 2 ms 608 KB Output is correct
5 Correct 2 ms 592 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 628 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 108 ms 17320 KB Output is correct
20 Correct 111 ms 16460 KB Output is correct
21 Correct 127 ms 17336 KB Output is correct
22 Correct 134 ms 17328 KB Output is correct
23 Correct 107 ms 17216 KB Output is correct
24 Correct 137 ms 17296 KB Output is correct
25 Correct 109 ms 16620 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 156 ms 20560 KB Output is correct
2 Correct 172 ms 20592 KB Output is correct
3 Correct 149 ms 20596 KB Output is correct
4 Correct 149 ms 21096 KB Output is correct
5 Correct 187 ms 20916 KB Output is correct
6 Correct 179 ms 20712 KB Output is correct
7 Correct 188 ms 20636 KB Output is correct
8 Correct 189 ms 20812 KB Output is correct
9 Correct 125 ms 17296 KB Output is correct
10 Correct 154 ms 20316 KB Output is correct
11 Correct 177 ms 20120 KB Output is correct
12 Correct 156 ms 20320 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 142 ms 20576 KB Output is correct
3 Correct 133 ms 20596 KB Output is correct
4 Correct 150 ms 20568 KB Output is correct
5 Correct 151 ms 20664 KB Output is correct
6 Correct 139 ms 20612 KB Output is correct
7 Correct 146 ms 20636 KB Output is correct
8 Correct 137 ms 21004 KB Output is correct
9 Correct 153 ms 21068 KB Output is correct
10 Correct 155 ms 20924 KB Output is correct
11 Correct 169 ms 20940 KB Output is correct
12 Correct 145 ms 20264 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 608 KB Output is correct
17 Correct 2 ms 592 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 2 ms 596 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 58 ms 4172 KB Output is correct
32 Correct 36 ms 4172 KB Output is correct
33 Correct 44 ms 4428 KB Output is correct
34 Correct 43 ms 4520 KB Output is correct
35 Correct 50 ms 4396 KB Output is correct
36 Correct 47 ms 4392 KB Output is correct
37 Correct 33 ms 3988 KB Output is correct
38 Correct 1 ms 460 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 2 ms 596 KB Output is correct
41 Correct 2 ms 632 KB Output is correct
42 Correct 2 ms 596 KB Output is correct
43 Correct 2 ms 628 KB Output is correct
44 Correct 2 ms 600 KB Output is correct
45 Correct 1 ms 596 KB Output is correct
46 Correct 1 ms 596 KB Output is correct
47 Correct 108 ms 17320 KB Output is correct
48 Correct 111 ms 16460 KB Output is correct
49 Correct 127 ms 17336 KB Output is correct
50 Correct 134 ms 17328 KB Output is correct
51 Correct 107 ms 17216 KB Output is correct
52 Correct 137 ms 17296 KB Output is correct
53 Correct 109 ms 16620 KB Output is correct
54 Correct 156 ms 20560 KB Output is correct
55 Correct 172 ms 20592 KB Output is correct
56 Correct 149 ms 20596 KB Output is correct
57 Correct 149 ms 21096 KB Output is correct
58 Correct 187 ms 20916 KB Output is correct
59 Correct 179 ms 20712 KB Output is correct
60 Correct 188 ms 20636 KB Output is correct
61 Correct 189 ms 20812 KB Output is correct
62 Correct 125 ms 17296 KB Output is correct
63 Correct 154 ms 20316 KB Output is correct
64 Correct 177 ms 20120 KB Output is correct
65 Correct 156 ms 20320 KB Output is correct
66 Correct 1 ms 468 KB Output is correct
67 Correct 151 ms 20552 KB Output is correct
68 Correct 170 ms 20524 KB Output is correct
69 Correct 157 ms 20596 KB Output is correct
70 Correct 176 ms 20656 KB Output is correct
71 Correct 163 ms 20660 KB Output is correct
72 Correct 160 ms 20668 KB Output is correct
73 Correct 171 ms 21040 KB Output is correct
74 Correct 165 ms 21016 KB Output is correct
75 Correct 188 ms 20944 KB Output is correct
76 Correct 185 ms 20988 KB Output is correct
77 Correct 139 ms 20312 KB Output is correct
78 Correct 1 ms 468 KB Output is correct
79 Correct 2 ms 596 KB Output is correct
80 Correct 2 ms 596 KB Output is correct
81 Correct 2 ms 596 KB Output is correct
82 Correct 2 ms 628 KB Output is correct
83 Correct 2 ms 596 KB Output is correct
84 Correct 1 ms 600 KB Output is correct
85 Correct 1 ms 600 KB Output is correct
86 Correct 52 ms 4156 KB Output is correct
87 Correct 37 ms 4140 KB Output is correct
88 Correct 50 ms 4448 KB Output is correct
89 Correct 44 ms 4516 KB Output is correct
90 Correct 47 ms 4372 KB Output is correct
91 Correct 49 ms 4304 KB Output is correct
92 Correct 41 ms 4048 KB Output is correct
93 Correct 148 ms 17332 KB Output is correct
94 Correct 125 ms 16460 KB Output is correct
95 Correct 141 ms 17108 KB Output is correct
96 Correct 121 ms 17232 KB Output is correct
97 Correct 126 ms 17212 KB Output is correct
98 Correct 124 ms 17260 KB Output is correct
99 Correct 105 ms 16632 KB Output is correct
100 Correct 198 ms 20728 KB Output is correct
101 Correct 180 ms 20692 KB Output is correct
102 Correct 180 ms 20832 KB Output is correct
103 Correct 161 ms 20312 KB Output is correct
104 Correct 162 ms 20124 KB Output is correct
105 Correct 159 ms 20380 KB Output is correct
106 Correct 179 ms 19968 KB Output is correct
107 Correct 170 ms 20028 KB Output is correct
108 Correct 202 ms 20648 KB Output is correct
109 Correct 170 ms 20676 KB Output is correct
110 Correct 183 ms 20644 KB Output is correct
111 Correct 191 ms 20632 KB Output is correct