Distinct sums

n = int(input())
if n % 2 == 0:
    print("YES")
    for i in range(n):
        if i < n // 2:
            y = [0 for j in range(n - i)]
            for j in range(i):
                y.append(1)
        else:
            y = [1 for j in range(n - i)]
            for j in range(i):
                y.append(2)
        print(*y)

else:
    print("IMPOSSIBLE")

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED