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#include <stdio.h>
int main()
{
int i=1,fact=1,n;
printf("enter the number");
scanf("%d",&n);
if(n==1)
printf("the factorials of 1 is 0 and 1");
else
{
while(i>0)
{
fact=fact*i;
if(fact==n)
{
printf("factorial number of %d is %d",n,i);
break;
}
if(fact>n)
{
printf("given number %d is not a perfect factorial",n);
break;
}
i++;
}
}
return 0;
}