Help me in solving EVENM problem

help
,
1

My issue

my code is correct but when i submit it it was showing wrong ,also i tried the correct submited code then also showing wrong

My code

# cook your dish here
for i in range(int(input())):
    n = int(input())
    mylist = []
    if n%2 != 0 :
        for i in range(1,n+1):
            mylist.append([])
            for j in range(n*i-(n-1),n*i+1):
                mylist[i-1].append(j)
    else:
        for i in range(1,n+1):
            mylist.append([])
            for j in range(n*i-(n-1),n*i+1):
                if i%2 == 0:
                    if j%2 != 0:
                        mylist[i-1].append(j+1)
                    else:
                        mylist[i-1].append(j-1)
                else:
                    mylist[i-1].append(j)
    for i in mylist:
        print(*i)

Problem Link: Even Matrix Practice Coding Problem

2

this problem has some judge problem
as it is not accepting correct since 2 year

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