题解 | #尼科彻斯定理#
尼科彻斯定理
http://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
n = int(input())
square = n ** 3
r = [_ for _ in range(1, n*2, 2)]
if sum(r) == square:
print("+".join(map(str, r)))
else:
sum_ = sum(r)
for i in range(r[-1], square, 2):
r.pop(0)
r.append(i)
if sum(r) == square:
break
print("+".join(map(str, r)))
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