题解 | 球格模型（简单版）

def check_ball_num(n: int, m: int, k: int):
    max_mn, min_mn = max(m, n), min(m, n)
    if k < max_mn:
        print(-1)
        return 0
    A = [[0 for _ in range(m)] for _ in range(n)]
    for i in range(min_mn):
        A[i][i] = 1
    if n > m:
        for i in range(m, n):
            A[i][min_mn - 1] = 1
    else:
        for i in range(n, m):
            A[min_mn - 1][i] = 1
    if k > max_mn:
        A[0][0]+= k - max_mn
    for i in range(n):
        print(" ".join(map(str,A[i])))

    return 0


while True:
    try:
        n, m, k = map(int, input().split())
        check_ball_num(n,m,k)
    except:
        break