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Problem E: 计算∑n!
Problem E: 计算∑n!
Time Limit:
1 Sec
Memory Limit:
128 MB
Submit:
707
Solved:
548
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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
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1 5
Sample Output
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1.0 153.0