a=int(input())
sum=1
max=0
for i in range(1,a+1):
	for j in range(1,i+1):
		sum=j*sum		
	max=max+sum
	sum=1
print(max)
python OJ 阶乘表
阅读 40
2022-04-07
a=int(input())
sum=1
max=0
for i in range(1,a+1):
	for j in range(1,i+1):
		sum=j*sum		
	max=max+sum
	sum=1
print(max)
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