CSES - Datatähti 2020 loppu

CSES - Datatähti 2020 loppu - Results

Submission details
Task:	Riippuliito
Sender:	Unto Karila
Submission time:	2020-02-09 15:01:38 +0200
Language:	C++ (C++11)
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	18
#2	ACCEPTED	21
#3	ACCEPTED	61

Test results
test	verdict	time	group
#1	ACCEPTED	0.01 s	1, 2, 3	details
#2	ACCEPTED	0.01 s	1, 2, 3	details
#3	ACCEPTED	0.01 s	1, 2, 3	details
#4	ACCEPTED	0.01 s	1, 2, 3	details
#5	ACCEPTED	0.01 s	1, 2, 3	details
#6	ACCEPTED	0.01 s	1, 2, 3	details
#7	ACCEPTED	0.01 s	1, 2, 3	details
#8	ACCEPTED	0.01 s	2, 3	details
#9	ACCEPTED	0.01 s	2, 3	details
#10	ACCEPTED	0.01 s	2, 3	details
#11	ACCEPTED	0.01 s	2, 3	details
#12	ACCEPTED	0.01 s	2, 3	details
#13	ACCEPTED	0.01 s	2, 3	details
#14	ACCEPTED	0.01 s	2, 3	details
#15	ACCEPTED	0.05 s	3	details
#16	ACCEPTED	0.25 s	3	details
#17	ACCEPTED	0.24 s	3	details
#18	ACCEPTED	0.21 s	3	details
#19	ACCEPTED	0.31 s	3	details
#20	ACCEPTED	0.43 s	3	details
#21	ACCEPTED	0.42 s	3	details
#22	ACCEPTED	0.01 s	1, 2, 3	details
#23	ACCEPTED	0.01 s	1, 2, 3	details
#24	ACCEPTED	0.01 s	1, 2, 3	details
#25	ACCEPTED	0.01 s	1, 2, 3	details
#26	ACCEPTED	0.01 s	1, 2, 3	details
#27	ACCEPTED	0.01 s	1, 2, 3	details
#28	ACCEPTED	0.01 s	1, 2, 3	details
#29	ACCEPTED	0.01 s	1, 2, 3	details

Code

#include <bits/stdc++.h>
#define ll long long
#define P 1000000007
#define N (1<<18)
#define F first
#define S second

using namespace std;

int hseg[2*N], valseg[2*N], n, ph[N];
pair<int, int> ord[N];

void add(int i, int o, int *seg){
	i += N;
	for(; i>0; i/=2){
		seg[i] = max(seg[i], o);
	}
}

int sum(int a, int b, int *seg){
	a += N;
	b += N;
	int s = 0;
	while(a<=b){
		if(a&1) s = max(s, seg[a++]);
		if(~b&1) s = max(s, seg[b--]);
		a /= 2;
		b /= 2;
	}
	return s;
}

int main(){

	cin >> n;

	for(int i=0; i<n; i++){
		int h;
		cin >> h;
		ord[i] = {h, i};
		ph[i] = h;
		add(i, h, hseg);
	}

	sort(ord, ord+n);

	for(int i=0; i<n; i++){
		int a = ord[i].S;
		int h = ord[i].F;

		int nval = 1;
		int k;

		if(a<n && ph[a]>ph[a+1]){
			k = a+1;
			for(int b=N; b>0; b/=2){
				while(b+k < n && sum(a+1, k+b, hseg) < h) k += b;
			}
			nval = max(nval, sum(a, k, valseg)+1);
		}

		if(a>0 && ph[a]>ph[a-1]){
			k = a-1;
			for(int b=N; b>0; b/=2){
				while(k-b >= 0 && sum(k-b, a-1, hseg) < h) k -= b;
			}

			nval = max(nval, sum(k, a, valseg)+1);
		}

		add(a, nval, valseg);
	}

	cout << sum(0, n-1, valseg) << endl;

}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 1 1 1 1 1 1 1 1 1 1` view save

correct output
`1` view save

user output
`1` view save

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 1 2 3 4 5 6 7 8 9 10` view save

correct output
`10` view save

user output
`10` view save

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 10 9 8 7 6 5 4 3 2 1` view save

correct output
`10` view save

user output
`10` view save

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 10 9 6 10 10 3 6 7 6 5` view save

correct output
`4` view save

user output
`4` view save

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 51 90 27 98 85 47 14 55 82 52` view save

correct output
`6` view save

user output
`6` view save

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 9 65 90 86 45 52 52 95 40 85` view save

correct output
`5` view save

user output
`5` view save

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 3 46 77 16 59 32 22 41 87 89` view save

correct output
`7` view save

user output
`7` view save

Test 8

Group: 2, 3

Verdict: ACCEPTED

input
`5000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

correct output
`1` view save

user output
`1` view save

Test 9

Group: 2, 3

Verdict: ACCEPTED

input
`5000 1 2 3 4 5 6 7 8 9 10 11 12 13 ...` view save

correct output
`5000` view save

user output
`5000` view save

Test 10

Group: 2, 3

Verdict: ACCEPTED

input
`5000 5000 4999 4998 4997 4996 4995 ...` view save

correct output
`5000` view save

user output
`5000` view save

Test 11

Group: 2, 3

Verdict: ACCEPTED

input
`5000 10 8 10 5 4 9 2 9 10 10 1 2 7 ...` view save

correct output
`9` view save

user output
`9` view save

Test 12

Group: 2, 3

Verdict: ACCEPTED

input
`5000 655923386 310000737 281882248 ...` view save

correct output
`28` view save

user output
`28` view save

Test 13

Group: 2, 3

Verdict: ACCEPTED

input
`5000 123456789 123456790 123456791 ...` view save

correct output
`2706` view save

user output
`2706` view save

Test 14

Group: 2, 3

Verdict: ACCEPTED

input
`5000 123456789 123456790 123456791 ...` view save

correct output
`5000` view save

user output
`5000` view save

Test 15

Group: 3

Verdict: ACCEPTED

input
`200000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

correct output
`1` view save

user output
`1` view save

Test 16

Group: 3

Verdict: ACCEPTED

input
`200000 1 2 3 4 5 6 7 8 9 10 11 12 13 ...` view save

correct output
`200000` view save

user output
`200000` view save

Test 17

Group: 3

Verdict: ACCEPTED

input
`200000 200000 199999 199998 199997 19...` view save

correct output
`200000` view save

user output
`200000` view save

Test 18

Group: 3

Verdict: ACCEPTED

input
`200000 4 7 8 3 3 10 3 4 2 6 10 8 5 8 ...` view save

correct output
`10` view save

user output
`10` view save

Test 19

Group: 3

Verdict: ACCEPTED

input
`200000 824527039 112439661 517794857 ...` view save

correct output
`43` view save

user output
`43` view save

Test 20

Group: 3

Verdict: ACCEPTED

input
`200000 123456789 123456790 123456791 ...` view save

correct output
`30764` view save

user output
`30764` view save

Test 21

Group: 3

Verdict: ACCEPTED

input
`200000 123456789 123456790 123456791 ...` view save

correct output
`61367` view save

user output
`61367` view save

Test 22

Group: 1, 2, 3

Verdict: ACCEPTED

input
`1 1` view save

correct output
`1` view save

user output
`1` view save

Test 23

Group: 1, 2, 3

Verdict: ACCEPTED

input
`2 1 1` view save

correct output
`1` view save

user output
`1` view save

Test 24

Group: 1, 2, 3

Verdict: ACCEPTED

input
`2 1 2` view save

correct output
`2` view save

user output
`2` view save

Test 25

Group: 1, 2, 3

Verdict: ACCEPTED

input
`2 2 1` view save

correct output
`2` view save

user output
`2` view save

Test 26

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3 1 2 1` view save

correct output
`2` view save

user output
`2` view save

Test 27

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3 1 2 3` view save

correct output
`3` view save

user output
`3` view save

Test 28

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3 3 2 1` view save

correct output
`3` view save

user output
`3` view save

Test 29

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3 2 1 2` view save

correct output
`2` view save

user output
`2` view save

Datatähti 2020 loppu

Riippuliito

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Test 26

Test 27

Test 28

Test 29

Tasks

Submissions (Unto Karila)