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Submission details
Task:Sorting
Sender:ziihrs
Submission time:2021-01-31 15:41:00 +0200
Language:Python3 (PyPy3)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#10.06 s1, 2details
#20.15 s2details
#30.10 s1, 2details
#40.13 s1, 2details

Code

for _ in range(int(input())):
	N = int(input())
	A = list(map(lambda s: int(s)-1, input().split()))

	for i in range(N):
		if A[i] == i: continue
		j = A.index(i)
		if j == N-1 or j == i+1:
			print('NO')
			break

		A[i], A[i+1], A[j], A[j+1] = A[j], A[j+1], A[i], A[i+1]
	else:
		print('YES')

Test details

Test 1

Group: 1, 2

Verdict:

input
153
1
1
2
1 2
...
view save

correct output
YES
YES
NO
NO
NO
...
view save

user output
YES
YES
NO
NO
NO
...
Truncated

Test 2

Group: 2

Verdict:

input
1000
59
35 29 32 50 11 15 9 21 19 45 2...
view save

correct output
YES
NO
YES
NO
YES
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 3

Group: 1, 2

Verdict:

input
720
6
1 6 4 5 2 3
6
6 3 2 1 5 4
...
view save

correct output
YES
NO
NO
NO
YES
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 4

Group: 1, 2

Verdict:

input
1000
8
7 4 2 8 6 3 5 1
8
3 8 2 7 5 4 6 1
...
view save

correct output
NO
NO
YES
NO
YES
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Tasks

A Greater Integers-B Split in Three-C Sorting-D Distances-E Programmers-F Polygonal Chain-

Submissions (ziihrs)

2:28:11 1000:13:26 0