CSES - Datatähti Open 2021 - Results
Submission details
Task:Programmers
Sender:doowey
Submission time:2021-01-31 16:55:10 +0200
Language: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
#17ACCEPTED0.07 s2, 3details
#18ACCEPTED0.24 s2, 3details
#19ACCEPTED0.23 s2, 3details
#20ACCEPTED0.26 s2, 3details
#21ACCEPTED0.28 s2, 3details
#22ACCEPTED0.28 s2, 3details
#23ACCEPTED0.28 s2, 3details
#24ACCEPTED0.65 s3details
#25ACCEPTED0.37 s3details
#26ACCEPTED0.69 s3details
#27ACCEPTED0.49 s3details
#28ACCEPTED0.66 s3details
#29ACCEPTED0.73 s3details
#30ACCEPTED0.72 s3details
#31ACCEPTED0.72 s3details

Code

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, int> pii;

#define fi first
#define se second
#define mp make_pair

const int N = (int)2e5 + 100;
ll d[N];
ll x[N];

int main(){
    int n,k;
    cin >> n >> k;
    for(int i = 0 ;i < n; i ++ ){
        cin >> x[i];
    }
    sort(x, x + n);
    for(int i = 0 ; i + 1 < n; i ++ ){
        d[i]=(x[i+1]-x[i]);
    }
    int m = n - 1;
    ll cum = 0;
    set<pii> qq;
    set<pii> aq;
    for(int i = 0 ; i < m ; i ++ ){
        qq.insert(mp(d[i], i));
        aq.insert(mp(i, d[i]));
    }
    int id;
    bool keep;
    int cost;
    for(int j = 0 ;j < k ; j ++ ){
        auto it = qq.begin();
        cost = it->fi;
        cum += cost;
        id = it->se;
        d[id]=-d[id];
        auto pi = aq.lower_bound(mp(id,-(int)1e9));
        auto nx = pi;
        auto pv = pi;
        keep=true;
        nx ++ ;
        if(nx == aq.end()){
            keep=false;
        }
        else{
            d[id]+=d[nx->fi];
            qq.erase(mp(nx->se,nx->fi));
            aq.erase(nx);
        }
        if(pv == aq.begin()){
            keep=false;
        }
        else{
            pv--;
            d[id]+=d[pv->fi];
            qq.erase(mp(pv->se,pv->fi));
            aq.erase(pv);
        }
        aq.erase(mp(id,cost));
        qq.erase(mp(cost,id));
        if(keep){
            qq.insert(mp(d[id],id));
            aq.insert(mp(id,d[id]));
        }

    }
    cout << cum << "\n";
    return 0;
}

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