题解 | #空心正方形图案#
空心正方形图案
https://www.nowcoder.com/practice/72347ee949dc47399186ee183632f303
while True: try: n=int(input()) for i in range(1,n+1): for j in range(1,n+1): if i==1 or j==1 or i==n or j==n: print("* ",end="") else: print(" ",end="") print() except: break