题解 | #尼科彻斯定理#
尼科彻斯定理
http://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
def f(m):
#公式法
n=int((m**2-m+2)/2)
for i in range(m-1):
print(2*n-1+2*i,end='+')
print(2*n-1+2*(m-1))
while 1:
try:
n=int(input())
f(n)
except Exception as e:
if not isinstance(e,EOFError):
print('wf_wf__Error')
break
