/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
int fact=1;
int sum=0;
int n=4;
for(int i=1;i<=n;i++)
{
fact=fact*i;
}
int rem=fact%10;
sum+=rem;
fact=fact/10;
}
}
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