CSES - Datatähti Open 2021 - Results
Submission details
Task:Programmers
Sender:zscoder
Submission time:2021-01-30 09:05:21 +0200
Language:C++ (C++11)
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED34
#2ACCEPTED21
#3ACCEPTED45
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2, 3details
#2ACCEPTED0.01 s1, 2, 3details
#3ACCEPTED0.01 s1, 2, 3details
#4ACCEPTED0.01 s1, 2, 3details
#5ACCEPTED0.01 s1, 2, 3details
#6ACCEPTED0.01 s1, 2, 3details
#7ACCEPTED0.01 s1, 2, 3details
#8ACCEPTED0.01 s1, 2, 3details
#9ACCEPTED0.01 s1, 2, 3details
#10ACCEPTED0.01 s1, 2, 3details
#11ACCEPTED0.01 s1, 2, 3details
#12ACCEPTED0.01 s1, 3details
#13ACCEPTED0.01 s1, 3details
#14ACCEPTED0.01 s1, 3details
#15ACCEPTED0.01 s1, 3details
#16ACCEPTED0.01 s1, 3details
#17ACCEPTED0.13 s2, 3details
#18ACCEPTED0.46 s2, 3details
#19ACCEPTED0.43 s2, 3details
#20ACCEPTED0.44 s2, 3details
#21ACCEPTED0.44 s2, 3details
#22ACCEPTED0.47 s2, 3details
#23ACCEPTED0.50 s2, 3details
#24ACCEPTED0.90 s3details
#25ACCEPTED0.98 s3details
#26ACCEPTED0.93 s3details
#27ACCEPTED0.95 s3details
#28ACCEPTED0.95 s3details
#29ACCEPTED0.93 s3details
#30ACCEPTED0.92 s3details
#31ACCEPTED0.94 s3details

Code

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
 
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<int> vi;
typedef long double ld; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;
 
ll a[211111];
int n;
map<ii, ll> ma;
set<ii> intervals;
ll res[211111];
 
void solve_fast(int k)
{
	ma.clear(); intervals.clear();
	multiset<pair<ll,ii> > pq;
	for(int i=0;i<n;i++)
	{
		pq.insert(mp(a[i], mp(i,i)));
		intervals.insert(mp(i,i));
		ma[mp(i,i)] = a[i];
	}
	ll ans = 0;
	for(int i=0;i<(n+1)/2;i++)
	{
		while(intervals.find((*prev(pq.end())).se)==intervals.end()) pq.erase(prev(pq.end()));
		ans += (*prev(pq.end())).fi;
		res[i+1] = ans;
		int l = (*prev(pq.end())).se.fi; int r = (*prev(pq.end())).se.se;
		auto it = intervals.find(mp(l,r));
		auto itr = it; auto itl= it;
		itr++; itl--; 
		vector<ii> era;
		if(it!=intervals.begin()) era.pb((*itl));
		if(itr!=intervals.end()) era.pb((*itr));
		if(itr!=intervals.end()&&it!=intervals.begin())
		{
			int veryl = (*itl).fi;
			int veryr = (*itr).se;
			intervals.insert(mp(veryl,veryr));
			ll V = ma[(*itl)] + ma[(*itr)] - ma[mp(l,r)];
			ma[mp(veryl,veryr)] = V;
			pq.insert(mp(V, mp(veryl, veryr)));
		}
		intervals.erase(mp(l,r));
		for(ii x:era) 
		{
			intervals.erase(x);
		}
	}
	cout<<abs(res[k])<<'\n';
}
 
int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin>>n;
	int k; cin>>k;
	vector<ll> x(n);
	for(int i=0;i<n;i++) cin>>x[i];
	sort(x.begin(),x.end());
	n--;
	for(int i=0;i<n;i++)
	{
		a[i]=x[i]-x[i+1];
	}
	solve_fast(k);
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
8 3
3 1 2 7 9 3 4 7

correct output
1

user output
1

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
2 1
2 13

correct output
11

user output
11

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
20 10
16 20 6 15 19 12 11 17 20 6 15...

correct output
6

user output
6

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
14 5
11 3 8 3 14 8 10 13 11 10 17 1...

correct output
0

user output
0

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

input
15 1
8 5 1 8 18 15 6 20 14 9 10 9 1...

correct output
0

user output
0

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

input
10 3
10 19 16 15 12 5 14 8 3 15

correct output
4

user output
4

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

input
202 90
177 187 183 647 616 580 499 78...

correct output
213

user output
213

Test 8

Group: 1, 2, 3

Verdict: ACCEPTED

input
2000 512
141 583 135 833 900 308 248 58...

correct output
0

user output
0

Test 9

Group: 1, 2, 3

Verdict: ACCEPTED

input
2000 972
685 4 289 865 93 159 48 866 56...

correct output
276

user output
276

Test 10

Group: 1, 2, 3

Verdict: ACCEPTED

input
2000 1000
698 153 298 118 631 341 238 7 ...

correct output
517

user output
517

Test 11

Group: 1, 2, 3

Verdict: ACCEPTED

input
2000 1
983 144 449 584 839 166 77 885...

correct output
0

user output
0

Test 12

Group: 1, 3

Verdict: ACCEPTED

input
1464 320
846762124 954854396 12767390 7...

correct output
35809369

user output
35809369

Test 13

Group: 1, 3

Verdict: ACCEPTED

input
2000 231
801945178 924940258 369188694 ...

correct output
7831421

user output
7831421

Test 14

Group: 1, 3

Verdict: ACCEPTED

input
2000 461
464790475 932031556 838378103 ...

correct output
37272564

user output
37272564

Test 15

Group: 1, 3

Verdict: ACCEPTED

input
2000 100
484046702 267135814 995006323 ...

correct output
1268400

user output
1268400

Test 16

Group: 1, 3

Verdict: ACCEPTED

input
2000 996
98352148 438929491 242618159 1...

correct output
445965905

user output
445965905

Test 17

Group: 2, 3

Verdict: ACCEPTED

input
65879 19675
896 316 972 476 636 227 716 78...

correct output
0

user output
0

Test 18

Group: 2, 3

Verdict: ACCEPTED

input
200000 53820
995 720 135 767 943 742 191 26...

correct output
0

user output
0

Test 19

Group: 2, 3

Verdict: ACCEPTED

input
200000 32297
527 947 84 851 908 833 339 112...

correct output
0

user output
0

Test 20

Group: 2, 3

Verdict: ACCEPTED

input
200000 99982
561 174 242 275 460 109 664 68...

correct output
322

user output
322

Test 21

Group: 2, 3

Verdict: ACCEPTED

input
200000 99955
911 33 314 861 298 117 972 982...

correct output
245

user output
245

Test 22

Group: 2, 3

Verdict: ACCEPTED

input
200000 99972
783 1000 673 611 87 452 702 92...

correct output
290

user output
290

Test 23

Group: 2, 3

Verdict: ACCEPTED

input
200000 99961
795 136 128 643 60 422 371 839...

correct output
252

user output
252

Test 24

Group: 3

Verdict: ACCEPTED

input
195426 76599
442872072 619088799 118541378 ...

correct output
143376538

user output
143376538

Test 25

Group: 3

Verdict: ACCEPTED

input
200000 1661
894106972 620084612 931442312 ...

correct output
33089

user output
33089

Test 26

Group: 3

Verdict: ACCEPTED

input
200000 86032
211444153 846442677 297198384 ...

correct output
196001810

user output
196001810

Test 27

Group: 3

Verdict: ACCEPTED

input
200000 28275
28280312 349705372 96535649 84...

correct output
11627219

user output
11627219

Test 28

Group: 3

Verdict: ACCEPTED

input
200000 81473
178022892 112774306 250584651 ...

correct output
162430841

user output
162430841

Test 29

Group: 3

Verdict: ACCEPTED

input
200000 99987
297598052 494409138 182268523 ...

correct output
489497036

user output
489497036

Test 30

Group: 3

Verdict: ACCEPTED

input
200000 99971
316462272 843156468 434342923 ...

correct output
483167476

user output
483167476

Test 31

Group: 3

Verdict: ACCEPTED

input
200000 99964
811543559 465033274 620180191 ...

correct output
481497328

user output
481497328