Submission #707574

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
707574	2023-03-09T11:17:46 Z	Trisanu_Das	Osumnjičeni (COCI21_osumnjiceni)	C++17	110 / 110	295 ms	31176 KB

Main

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define ar array
 
const int mxN=2e5;
int n, q, l[mxN], r[mxN], anc[mxN][18];
 
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i=0; i<n; ++i)
		cin >> l[i] >> r[i];
	set<ar<int, 2>> s;
	for (int i=n-1, j=n-1; ~i; --i) {
		while(1) {
			if (s.empty()||r[i]<(*s.begin())[0]||l[i]>(*s.rbegin())[1]) {
				s.insert({l[i], r[i]});
				break;
			}
			auto it=s.lower_bound({l[i], -1});
			if ((it==s.end()||r[i]<(*it)[0])&&(it==s.begin()||(*prev(it))[1]<l[i])) {
				s.insert({l[i], r[i]});
				break;
			}
			s.erase({l[j], r[j]});
			--j;
		}
		anc[i][0]=j+1;
	}
	for (int j=1; j<18; ++j)
		for (int i=0; i<n; ++i)
			anc[i][j]=anc[i][j-1]==n?n:anc[anc[i][j-1]][j-1];
	cin >> q;
	while(q--) {
		int a, b;
		cin >> a >> b, --a, --b;
		int ans=0;
		for (int i=17; ~i; --i)
			if (anc[a][i]<=b) {
				ans+=1<<i;
				a=anc[a][i];
			}
		cout << ans+1 << "\n";
	}
	return 0;
}

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	75 ms	15260 KB	Output is correct
2	Correct	76 ms	15096 KB	Output is correct
3	Correct	77 ms	15072 KB	Output is correct
4	Correct	95 ms	15160 KB	Output is correct
5	Correct	81 ms	15856 KB	Output is correct
6	Correct	76 ms	18076 KB	Output is correct
7	Correct	81 ms	18408 KB	Output is correct
8	Correct	84 ms	18380 KB	Output is correct
9	Correct	92 ms	18856 KB	Output is correct
10	Correct	90 ms	18220 KB	Output is correct
11	Correct	183 ms	28124 KB	Output is correct
12	Correct	180 ms	26304 KB	Output is correct
13	Correct	194 ms	26196 KB	Output is correct
14	Correct	199 ms	24012 KB	Output is correct
15	Correct	212 ms	22220 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	87 ms	19152 KB	Output is correct

Subtask #2

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	724 KB	Output is correct
2	Correct	4 ms	852 KB	Output is correct
3	Correct	4 ms	856 KB	Output is correct
4	Correct	4 ms	848 KB	Output is correct
5	Correct	5 ms	852 KB	Output is correct
6	Correct	4 ms	852 KB	Output is correct
7	Correct	4 ms	848 KB	Output is correct
8	Correct	4 ms	772 KB	Output is correct
9	Correct	4 ms	852 KB	Output is correct
10	Correct	3 ms	852 KB	Output is correct
11	Correct	5 ms	980 KB	Output is correct
12	Correct	4 ms	964 KB	Output is correct
13	Correct	5 ms	980 KB	Output is correct
14	Correct	5 ms	852 KB	Output is correct
15	Correct	4 ms	848 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	3 ms	852 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	724 KB	Output is correct
2	Correct	4 ms	852 KB	Output is correct
3	Correct	4 ms	856 KB	Output is correct
4	Correct	4 ms	848 KB	Output is correct
5	Correct	5 ms	852 KB	Output is correct
6	Correct	4 ms	852 KB	Output is correct
7	Correct	4 ms	848 KB	Output is correct
8	Correct	4 ms	772 KB	Output is correct
9	Correct	4 ms	852 KB	Output is correct
10	Correct	3 ms	852 KB	Output is correct
11	Correct	5 ms	980 KB	Output is correct
12	Correct	4 ms	964 KB	Output is correct
13	Correct	5 ms	980 KB	Output is correct
14	Correct	5 ms	852 KB	Output is correct
15	Correct	4 ms	848 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	3 ms	852 KB	Output is correct
18	Correct	66 ms	3532 KB	Output is correct
19	Correct	61 ms	3152 KB	Output is correct
20	Correct	68 ms	3528 KB	Output is correct
21	Correct	63 ms	3244 KB	Output is correct
22	Correct	63 ms	3324 KB	Output is correct
23	Correct	71 ms	3240 KB	Output is correct
24	Correct	71 ms	3384 KB	Output is correct
25	Correct	71 ms	3424 KB	Output is correct
26	Correct	60 ms	3404 KB	Output is correct
27	Correct	59 ms	3140 KB	Output is correct
28	Correct	55 ms	3020 KB	Output is correct
29	Correct	58 ms	3092 KB	Output is correct
30	Correct	48 ms	3104 KB	Output is correct
31	Correct	46 ms	2880 KB	Output is correct
32	Correct	55 ms	3044 KB	Output is correct
33	Correct	0 ms	340 KB	Output is correct
34	Correct	51 ms	3164 KB	Output is correct

Subtask #4

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	82 ms	15928 KB	Output is correct
2	Correct	102 ms	19452 KB	Output is correct
3	Correct	75 ms	18080 KB	Output is correct
4	Correct	80 ms	17868 KB	Output is correct
5	Correct	83 ms	18460 KB	Output is correct
6	Correct	68 ms	18144 KB	Output is correct
7	Correct	88 ms	17976 KB	Output is correct
8	Correct	80 ms	18016 KB	Output is correct
9	Correct	79 ms	17944 KB	Output is correct
10	Correct	100 ms	19364 KB	Output is correct
11	Correct	157 ms	26060 KB	Output is correct
12	Correct	181 ms	28592 KB	Output is correct
13	Correct	150 ms	26072 KB	Output is correct
14	Correct	164 ms	22336 KB	Output is correct
15	Correct	213 ms	24268 KB	Output is correct
16	Correct	1 ms	328 KB	Output is correct
17	Correct	70 ms	18404 KB	Output is correct

Subtask #5

50.0 / 50.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	75 ms	15260 KB	Output is correct
2	Correct	76 ms	15096 KB	Output is correct
3	Correct	77 ms	15072 KB	Output is correct
4	Correct	95 ms	15160 KB	Output is correct
5	Correct	81 ms	15856 KB	Output is correct
6	Correct	76 ms	18076 KB	Output is correct
7	Correct	81 ms	18408 KB	Output is correct
8	Correct	84 ms	18380 KB	Output is correct
9	Correct	92 ms	18856 KB	Output is correct
10	Correct	90 ms	18220 KB	Output is correct
11	Correct	183 ms	28124 KB	Output is correct
12	Correct	180 ms	26304 KB	Output is correct
13	Correct	194 ms	26196 KB	Output is correct
14	Correct	199 ms	24012 KB	Output is correct
15	Correct	212 ms	22220 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	87 ms	19152 KB	Output is correct
18	Correct	3 ms	724 KB	Output is correct
19	Correct	4 ms	852 KB	Output is correct
20	Correct	4 ms	856 KB	Output is correct
21	Correct	4 ms	848 KB	Output is correct
22	Correct	5 ms	852 KB	Output is correct
23	Correct	4 ms	852 KB	Output is correct
24	Correct	4 ms	848 KB	Output is correct
25	Correct	4 ms	772 KB	Output is correct
26	Correct	4 ms	852 KB	Output is correct
27	Correct	3 ms	852 KB	Output is correct
28	Correct	5 ms	980 KB	Output is correct
29	Correct	4 ms	964 KB	Output is correct
30	Correct	5 ms	980 KB	Output is correct
31	Correct	5 ms	852 KB	Output is correct
32	Correct	4 ms	848 KB	Output is correct
33	Correct	1 ms	340 KB	Output is correct
34	Correct	3 ms	852 KB	Output is correct
35	Correct	66 ms	3532 KB	Output is correct
36	Correct	61 ms	3152 KB	Output is correct
37	Correct	68 ms	3528 KB	Output is correct
38	Correct	63 ms	3244 KB	Output is correct
39	Correct	63 ms	3324 KB	Output is correct
40	Correct	71 ms	3240 KB	Output is correct
41	Correct	71 ms	3384 KB	Output is correct
42	Correct	71 ms	3424 KB	Output is correct
43	Correct	60 ms	3404 KB	Output is correct
44	Correct	59 ms	3140 KB	Output is correct
45	Correct	55 ms	3020 KB	Output is correct
46	Correct	58 ms	3092 KB	Output is correct
47	Correct	48 ms	3104 KB	Output is correct
48	Correct	46 ms	2880 KB	Output is correct
49	Correct	55 ms	3044 KB	Output is correct
50	Correct	0 ms	340 KB	Output is correct
51	Correct	51 ms	3164 KB	Output is correct
52	Correct	82 ms	15928 KB	Output is correct
53	Correct	102 ms	19452 KB	Output is correct
54	Correct	75 ms	18080 KB	Output is correct
55	Correct	80 ms	17868 KB	Output is correct
56	Correct	83 ms	18460 KB	Output is correct
57	Correct	68 ms	18144 KB	Output is correct
58	Correct	88 ms	17976 KB	Output is correct
59	Correct	80 ms	18016 KB	Output is correct
60	Correct	79 ms	17944 KB	Output is correct
61	Correct	100 ms	19364 KB	Output is correct
62	Correct	157 ms	26060 KB	Output is correct
63	Correct	181 ms	28592 KB	Output is correct
64	Correct	150 ms	26072 KB	Output is correct
65	Correct	164 ms	22336 KB	Output is correct
66	Correct	213 ms	24268 KB	Output is correct
67	Correct	1 ms	328 KB	Output is correct
68	Correct	70 ms	18404 KB	Output is correct
69	Correct	223 ms	21988 KB	Output is correct
70	Correct	248 ms	22980 KB	Output is correct
71	Correct	266 ms	21336 KB	Output is correct
72	Correct	240 ms	22292 KB	Output is correct
73	Correct	291 ms	22000 KB	Output is correct
74	Correct	256 ms	23148 KB	Output is correct
75	Correct	295 ms	21664 KB	Output is correct
76	Correct	252 ms	23272 KB	Output is correct
77	Correct	285 ms	21564 KB	Output is correct
78	Correct	268 ms	22076 KB	Output is correct
79	Correct	224 ms	31176 KB	Output is correct
80	Correct	210 ms	28968 KB	Output is correct
81	Correct	214 ms	28780 KB	Output is correct
82	Correct	254 ms	25520 KB	Output is correct
83	Correct	216 ms	24464 KB	Output is correct
84	Correct	0 ms	212 KB	Output is correct
85	Correct	141 ms	21736 KB	Output is correct