Zzuli: cumulative sum of 1050 factorials

Title Description

seek 1! + 2! + ……n!

Input

Enter an integer n, You can assume that n No more than 10.

Output

Output an integer , That is, the result of factorial accumulation , Take a line alone .

The sample input  Copy

4

Sample output  Copy

33

#include <stdio.h>
int main()
{
	int n,i,sum=0,mul=1;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		mul=mul*i;
		sum=sum+mul;
	}
	printf("%d",sum);
	return 0;
}