oj.uz

Submission #965729

# Submission time Handle Problem Language Result Execution time Memory
965729 2024-04-19T06:19:38 Z NotLinux Event Hopping (BOI22_events) C++17
100 / 100
 92 ms 13460 KB 
#include <bits/stdc++.h>
using namespace std;
 
const int N = 1e5 + 10 , L = 18;
int n , q , l[N] , r[N] , mv[L][N];
vector <int> vec , st;
 
bool cmp(int a , int b) {
	if(r[a] != r[b]) return r[a] < r[b];
	return l[a] < l[b];
}
 
int Bs(int x){
	int low = -1 , high = st.size();
	while(high - low > 1) {
		int mid = (low + high) >> 1;
		if(r[st[mid]] >= x) high = mid;
		else low = mid;
	}
	return st[high];
}
 
int solve(int from , int to , int bit) {
	if(bit == -1) return 0;
	int nex = mv[bit][from];
	if(l[nex] > r[to]) return (1 << bit) + solve(nex , to , bit - 1);
	return solve(from , to , bit - 1);
}
 
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);  cout.tie(0);
	cin >> n >> q;
	for(int i = 1 ; i <= n ; i++) {
		cin >> l[i] >> r[i];
		vec.push_back(i);
	}
	sort(vec.begin() , vec.end() , cmp);
	for(int i = 1 ; i <= n ; i++) {
		int now = vec[i];
		while(!st.empty() && l[st.back()] >= l[now]) st.pop_back();
		st.push_back(now);
		mv[0][now] = Bs(l[now]);
	}
	for(int i = 1 ; i < L ; i++)   for(int j = 1 ; j <= n ; j++) mv[i][j] = mv[i - 1][mv[i - 1][j]];
	while(q--) {
		int s , e;  cin >> s >> e;
		if(l[mv[L - 1][e]] > r[s] || r[e] < r[s]) {
			cout << "impossible" << '\n';
			continue;
		}
		if(s == e) {
			cout << 0 << '\n';
			continue;
		}
		if(l[e] <= r[s]) {
			cout << 1 << '\n';
			continue;
		}
		cout << solve(e , s , L - 1) + 2 << '\n';
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 65 ms 12840 KB Output is correct
3 Correct 71 ms 12716 KB Output is correct
4 Correct 92 ms 12772 KB Output is correct
5 Correct 72 ms 12884 KB Output is correct
6 Correct 70 ms 12912 KB Output is correct
7 Correct 70 ms 12888 KB Output is correct
8 Correct 65 ms 13356 KB Output is correct
9 Correct 61 ms 13140 KB Output is correct
10 Correct 69 ms 13184 KB Output is correct
11 Correct 65 ms 13140 KB Output is correct
12 Correct 42 ms 12500 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6488 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6488 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6488 KB Output is correct
17 Correct 1 ms 6620 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 26 ms 8040 KB Output is correct
20 Correct 24 ms 8288 KB Output is correct
21 Correct 27 ms 8524 KB Output is correct
22 Correct 20 ms 8540 KB Output is correct
23 Correct 24 ms 8528 KB Output is correct
24 Correct 21 ms 8460 KB Output is correct
25 Correct 28 ms 8016 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6488 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6612 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6628 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 1 ms 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 40 ms 10972 KB Output is correct
20 Correct 39 ms 10324 KB Output is correct
21 Correct 35 ms 10448 KB Output is correct
22 Correct 42 ms 10892 KB Output is correct
23 Correct 39 ms 11092 KB Output is correct
24 Correct 44 ms 11092 KB Output is correct
25 Correct 17 ms 9948 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 12824 KB Output is correct
2 Correct 71 ms 12808 KB Output is correct
3 Correct 81 ms 12884 KB Output is correct
4 Correct 57 ms 13460 KB Output is correct
5 Correct 68 ms 13144 KB Output is correct
6 Correct 73 ms 12888 KB Output is correct
7 Correct 72 ms 12948 KB Output is correct
8 Correct 68 ms 12996 KB Output is correct
9 Correct 37 ms 11092 KB Output is correct
10 Correct 68 ms 12652 KB Output is correct
11 Correct 63 ms 12472 KB Output is correct
12 Correct 68 ms 12628 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 65 ms 12840 KB Output is correct
3 Correct 71 ms 12716 KB Output is correct
4 Correct 92 ms 12772 KB Output is correct
5 Correct 72 ms 12884 KB Output is correct
6 Correct 70 ms 12912 KB Output is correct
7 Correct 70 ms 12888 KB Output is correct
8 Correct 65 ms 13356 KB Output is correct
9 Correct 61 ms 13140 KB Output is correct
10 Correct 69 ms 13184 KB Output is correct
11 Correct 65 ms 13140 KB Output is correct
12 Correct 42 ms 12500 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 1 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 1 ms 6488 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6492 KB Output is correct
22 Correct 1 ms 6488 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 2 ms 6488 KB Output is correct
29 Correct 1 ms 6620 KB Output is correct
30 Correct 1 ms 6492 KB Output is correct
31 Correct 26 ms 8040 KB Output is correct
32 Correct 24 ms 8288 KB Output is correct
33 Correct 27 ms 8524 KB Output is correct
34 Correct 20 ms 8540 KB Output is correct
35 Correct 24 ms 8528 KB Output is correct
36 Correct 21 ms 8460 KB Output is correct
37 Correct 28 ms 8016 KB Output is correct
38 Correct 1 ms 6492 KB Output is correct
39 Correct 1 ms 6612 KB Output is correct
40 Correct 1 ms 6492 KB Output is correct
41 Correct 1 ms 6628 KB Output is correct
42 Correct 1 ms 6492 KB Output is correct
43 Correct 1 ms 6492 KB Output is correct
44 Correct 2 ms 6492 KB Output is correct
45 Correct 1 ms 6492 KB Output is correct
46 Correct 1 ms 6492 KB Output is correct
47 Correct 40 ms 10972 KB Output is correct
48 Correct 39 ms 10324 KB Output is correct
49 Correct 35 ms 10448 KB Output is correct
50 Correct 42 ms 10892 KB Output is correct
51 Correct 39 ms 11092 KB Output is correct
52 Correct 44 ms 11092 KB Output is correct
53 Correct 17 ms 9948 KB Output is correct
54 Correct 63 ms 12824 KB Output is correct
55 Correct 71 ms 12808 KB Output is correct
56 Correct 81 ms 12884 KB Output is correct
57 Correct 57 ms 13460 KB Output is correct
58 Correct 68 ms 13144 KB Output is correct
59 Correct 73 ms 12888 KB Output is correct
60 Correct 72 ms 12948 KB Output is correct
61 Correct 68 ms 12996 KB Output is correct
62 Correct 37 ms 11092 KB Output is correct
63 Correct 68 ms 12652 KB Output is correct
64 Correct 63 ms 12472 KB Output is correct
65 Correct 68 ms 12628 KB Output is correct
66 Correct 1 ms 6492 KB Output is correct
67 Correct 61 ms 12828 KB Output is correct
68 Correct 73 ms 12780 KB Output is correct
69 Correct 81 ms 12764 KB Output is correct
70 Correct 77 ms 13020 KB Output is correct
71 Correct 74 ms 12892 KB Output is correct
72 Correct 79 ms 12856 KB Output is correct
73 Correct 57 ms 13284 KB Output is correct
74 Correct 58 ms 13224 KB Output is correct
75 Correct 71 ms 13132 KB Output is correct
76 Correct 77 ms 13272 KB Output is correct
77 Correct 42 ms 12572 KB Output is correct
78 Correct 1 ms 6488 KB Output is correct
79 Correct 1 ms 6652 KB Output is correct
80 Correct 1 ms 6492 KB Output is correct
81 Correct 1 ms 6492 KB Output is correct
82 Correct 1 ms 6492 KB Output is correct
83 Correct 2 ms 6492 KB Output is correct
84 Correct 1 ms 6492 KB Output is correct
85 Correct 1 ms 6492 KB Output is correct
86 Correct 26 ms 8036 KB Output is correct
87 Correct 24 ms 8272 KB Output is correct
88 Correct 27 ms 8528 KB Output is correct
89 Correct 23 ms 8784 KB Output is correct
90 Correct 20 ms 8280 KB Output is correct
91 Correct 19 ms 8280 KB Output is correct
92 Correct 23 ms 8088 KB Output is correct
93 Correct 41 ms 10940 KB Output is correct
94 Correct 39 ms 10328 KB Output is correct
95 Correct 35 ms 10532 KB Output is correct
96 Correct 46 ms 10888 KB Output is correct
97 Correct 38 ms 11088 KB Output is correct
98 Correct 41 ms 11092 KB Output is correct
99 Correct 17 ms 9948 KB Output is correct
100 Correct 72 ms 12820 KB Output is correct
101 Correct 72 ms 12888 KB Output is correct
102 Correct 65 ms 13048 KB Output is correct
103 Correct 68 ms 12628 KB Output is correct
104 Correct 63 ms 12372 KB Output is correct
105 Correct 72 ms 12500 KB Output is correct
106 Correct 66 ms 12120 KB Output is correct
107 Correct 81 ms 12304 KB Output is correct
108 Correct 54 ms 12516 KB Output is correct
109 Correct 60 ms 12592 KB Output is correct
110 Correct 52 ms 12500 KB Output is correct
111 Correct 51 ms 12496 KB Output is correct