Ruudukko

t = int(input())


def ratko(n: int, m: int) -> list[list[int]]:
    assert n <= m, "pikku ämmä"
    # speciaali yhdelle riville:
    # 2 4 1 3
    if n == 1:
        rivi = list(range(2, m + 1, 2)) + list(range(1, m + 1, 2))
        return [[value] for value in rivi]
    tulos = [list() for x in range(m)]
    c = 1
    for i in range(n):
        for j in range(m):
            tulos[j].append(c)
            c += 1
    for x in range(m):
        if x % 2 == 1:
            tulos[x] = tulos[x][-1:] + tulos[x][0:-1]

    return tulos


swappi = False

while t > 0:
    t -= 1
    n, m = [int(x) for x in input().split()]
    if n > m:
        swappi = True
        n, m = m, n

    if (n, m) in {(1, 2), (1, 3), (2, 2)}:
        print("No")
        continue
    print("YES")
    tulos = ratko(n, m)
    if swappi:
        n, m = m, n
    for x in range(n):
        rivi = ""
        for y in range(m):
            if swappi:
                rivi += str(tulos[x][y]) + " "
            else:
                rivi += str(tulos[y][x]) + " "
        print(rivi.strip())

Test 1

Verdict: WRONG ANSWER