Codeup 1505 - 2차원 배열 채우기 3(달팽이 배열)


n = int(input())
matrix = [[0]*n for i in range(n)]
cnt = 0
offset = 0
row = n
col = n
while row > 0 and col > 0:
    for i in range(offset, offset+col):
        cnt += 1
        matrix[offset][i] = cnt
    for i in range(offset+1, offset+row):
        cnt += 1
        matrix[i][offset+col-1] = cnt
    for i in range(offset+col-2, offset-1, -1):
        cnt += 1
        matrix[offset+row-1][i] = cnt
    for i in range(offset+row-2, offset, -1):
        cnt += 1
        matrix[i][offset] = cnt
    offset += 1
    row -= 2
    col -= 2
for i in range(0, n):
    for j in range(0, n):
        print(matrix[i][j], end=' ')
    print()