题解 | #尼科彻斯定理#

import sys

for line in sys.stdin:
    a = int(line.strip())
    list1 = [x for x in range(1,a**3) if x%2 != 0]
    for i in range(a**3//2):
        if sum(list1[i:i+a]) == a**3:
            resault = list1[i:i+a]
            break
    for i in range(len(resault)):
        if i == len(resault)-1:
            print(resault[i],end="")
        else:
            print(resault[i],end="+")