Square Frame

n = int(input())
#printing the top row
print("+", end = " ")
for i in range(n - 2):
  print("-", end = " ")
print("+")
#printing the mid rows
for row in range(n -2):
  print("|", end = " ")
  for col in range(n - 2):
    print("-", end = " ")
  print("|")
#printing the bottom row
print("+", end = " ")
for i in range(n - 2):
  print("-", end = " ")
print("+")