Toggle navigation
万里ACM
F.A.Qs
Web Board
ProblemSet
Source/Category
Status
Ranklist
Contest
[
ProblemSet
Status
Ranklist
OI Ranklist
Statistics
]
Login
Problem Y: 计算∑n!
Problem Y: 计算∑n!
Time Limit:
1 Sec
Memory Limit:
128 MB
Submit:
707
Solved:
548
[
Submit
] [
Status
] [
Web Board
] [Creator:
]
Description
输入正整数n(0<n<10),计算∑n!=1!+2!+3!+...+n!
要求:由于阶乘的结果比较大,按浮点数格式输出计算结果,有效数值保留一位小数点。
Sample Input
Copy
1 5
Sample Output
Copy
1.0 153.0