Ruudukko

n = int(input(""))
 
arr = [[0 for x in range(n)] for y in range(n)]
 
for row in range(n):
    rownums = []
    
    for col in range(n):
        colnums = []
        
        for i in range(row):
            colnums.append(arr[i][col])
 
        fit = False
        val = 0
        
        while not fit:
            val += 1
            if val not in rownums and val not in colnums:
                fit = True
                arr[row][col] = val
                rownums.append(val)
 
for i in range(n):
    for j in range(n):
        print(arr[i][j], end = ' ')
    print()

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED