题解 | #尼科彻斯定理#

import sys

for line in sys.stdin:
    a = int(line.strip())
    num = a**3
    re = ''
    list1 = [i for i in range(num) if i%2 != 0]
    for j in range(num-a):
        if sum(list1[j:j+a]) == num:
            for k in list1[j:j+a]:
                re += str(k) +'+'
    print(re[:-1])