题解 | #尼科彻斯定理#
尼科彻斯定理
https://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
a = int(input())
x = a**3
y = []
for i in range(1,x+1,2):
if (i+i+2*(a-1))/2*a==x:
for q in range(a):
y.append(str(i+2*q))
print("+".join(y))
