33 lines
387 B
Markdown
33 lines
387 B
Markdown
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# 阶乘和
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## Tags
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- C++一本通
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- 高精度
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## Description
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已知正整数 $N (N\le100)$，设$S=1!+2!+3!+\cdots+N!$
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其中 "!" 表示阶乘，即$N!=1\times 2\times 3\times\cdots\times (N-1)\times N$
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如：$3!=1\times 2\times 3=6$
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请编程实现：输入正整数$N$，输出计算结果$S$的值
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## Example Cases
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### Case 1
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#### Input
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```
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4
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```
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#### Output
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```
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33
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```
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