1261: 【基础】计算N的阶乘
Memory Limit:16 MB
Time Limit:1.000 S
Judge Style:Text Compare
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Submit:3
Solved:3
Description
请计算n的阶乘(1<=n<=100)
n的阶乘计算公式为:n!=n*(n-1)*(n-2)*...*1,如:5!=5*4*3*2*1=120
Input
一个整数n(1<=n<=100)
Output
n的阶乘
Sample Input Copy
20
Sample Output Copy
2432902008176640000