CSES - Aalto Competitive Programming 2024 - wk4 - Wed - Results
Submission details
Task:Pair sort
Sender:aalto2024d_002
Submission time:2024-09-25 16:36:33 +0300
Language:Python3 (CPython3)
Status:READY
Result:
Test results
testverdicttime
#1ACCEPTED0.02 sdetails
#2ACCEPTED0.02 sdetails
#3ACCEPTED0.02 sdetails
#4ACCEPTED0.02 sdetails
#5ACCEPTED0.02 sdetails
#6ACCEPTED0.02 sdetails
#7ACCEPTED0.02 sdetails
#8ACCEPTED0.02 sdetails
#9ACCEPTED0.06 sdetails
#10ACCEPTED0.05 sdetails
#11ACCEPTED0.16 sdetails
#12ACCEPTED0.16 sdetails
#13--details
#14--details

Code

def solve():
    n = int(input())
    arr = list(map(int, input().split()))

    swaps = []
    
    for i in range(2 * n):
        for j in range(i + 1, 2 * n):
            if arr[i] == arr[j]:
                if j != i + 1:
                    arr[i + 1], arr[j] = arr[j], arr[i + 1]
                    swaps.append((i + 2, j + 1))
                break
    
    print(len(swaps))
    for swap in swaps:
        print(swap[0], swap[1])

solve()

Test details

Test 1

Verdict: ACCEPTED

input
5
3 2 4 5 1 3 2 1 4 5 

correct output
3
2 6
4 9
6 8

user output
3
2 6
4 9
6 8

Test 2

Verdict: ACCEPTED

input
5
3 2 4 5 1 3 2 1 4 5 

correct output
3
2 6
4 9
6 8

user output
3
2 6
4 9
6 8

Test 3

Verdict: ACCEPTED

input
10
3 6 6 8 8 9 9 1 4 5 2 4 10 2 1...

correct output
9
2 17
4 17
6 17
8 17
...

user output
9
2 17
4 17
6 17
8 17
...

Test 4

Verdict: ACCEPTED

input
10
3 6 6 8 8 9 9 1 4 5 2 4 10 2 1...

correct output
9
2 17
4 17
6 17
8 17
...

user output
9
2 17
4 17
6 17
8 17
...

Test 5

Verdict: ACCEPTED

input
50
47 26 6 35 13 18 9 19 14 50 34...

correct output
48
2 87
4 78
6 71
8 55
...

user output
48
2 87
4 78
6 71
8 55
...
Truncated

Test 6

Verdict: ACCEPTED

input
50
47 26 6 35 13 18 9 19 14 50 34...

correct output
48
2 87
4 78
6 71
8 55
...

user output
48
2 87
4 78
6 71
8 55
...
Truncated

Test 7

Verdict: ACCEPTED

input
100
56 26 6 35 60 72 9 55 83 51 58...

correct output
97
2 77
4 108
6 141
8 55
...

user output
97
2 77
4 108
6 141
8 55
...
Truncated

Test 8

Verdict: ACCEPTED

input
100
56 26 6 35 60 72 9 55 83 51 58...

correct output
97
2 77
4 108
6 141
8 55
...

user output
97
2 77
4 108
6 141
8 55
...
Truncated

Test 9

Verdict: ACCEPTED

input
500
56 146 351 35 281 235 354 449 ...

correct output
497
2 758
4 820
6 125
8 243
...

user output
497
2 758
4 820
6 125
8 243
...
Truncated

Test 10

Verdict: ACCEPTED

input
500
56 146 351 35 281 235 354 449 ...

correct output
497
2 758
4 820
6 125
8 243
...

user output
497
2 758
4 820
6 125
8 243
...
Truncated

Test 11

Verdict: ACCEPTED

input
1000
603 596 351 885 530 235 354 56...

correct output
993
2 256
4 1534
6 816
8 1057
...

user output
993
2 256
4 1534
6 816
8 1057
...
Truncated

Test 12

Verdict: ACCEPTED

input
1000
603 596 351 885 530 235 354 56...

correct output
993
2 256
4 1534
6 816
8 1057
...

user output
993
2 256
4 1534
6 816
8 1057
...
Truncated

Test 13

Verdict:

input
5000
1594 596 1797 3776 1201 235 35...

correct output
4993
2 1548
4 9062
6 6397
8 8296
...

user output
(empty)

Test 14

Verdict:

input
5000
1594 596 1797 3776 1201 235 35...

correct output
4993
2 1548
4 9062
6 6397
8 8296
...

user output
(empty)