Ruudukko

rows = int(input())

table = [[0 for _ in range(rows)] for _ in range(rows)]

for y in range(rows):
    for x in range(rows):
        possibilities = list(range(1, rows+1))
        invalidh = [e for e in table[y] if table[y].index(e)<x]
        column = [row[x] for row in table]
        invalidv = [f for f in column if column.index(f)<y]
        possibilities = [e for e in possibilities if e not in invalidh and e not in invalidv]
        table[y][x] = min(possibilities)
        
        print(str(table[y][x]), end="")
        if x == rows-1:
            print()
        else:
            print(" ", end="")

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    table[...

Test 4

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    table[...

Test 5

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    table[...

Test 6

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    table[...