#4. 【入门】编程求1*2*3*...*n
【入门】编程求1*2*3*...*n
说明
编程求1*2*3*...*n输入格式
输入一行,只有一个整数n(1<=n<=10)输出格式
输出只有一行(这意味着末尾有一个回车符号),包括1个整数。5120
5120
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