Filled square (functions/book)

n = int(input())

def print_header_footer(n):
  for i in range(0, n * 2):
    print("-", end="")
  print()

def middle_row(n):
  for i in range(n - 2):
    print("-", end="")
    for j in range(n -1):
      print("\\/", end="")
    print("-", end="")
    print()

print_header_footer(n)
middle_row(n)
print_header_footer(n)