题解 | #尼科彻斯定理#
尼科彻斯定理
https://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
N = int(input())
N2 = N*N
res = []
nums =int( N2 - (N/2)*2 +1)
for i in range(N):
res.append(nums)
if(i<N-1):
res.append("+")
nums += 2
for o in res:
print(o, end="")
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