/* 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
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	//	Ideone id = new Ideone();
		long t = fact(10);
		System.out.println(t);
		long y = summery(100);
		System.out.println(y);
	}
	public static long fact(int n){
		long res = 1;
		for (int i=1; i<=n; i++){
			res = res*i;
		}
		return res;
	}
 
	public static long summery(int n){
		long result = 0;
		for (int i=0; i<=n; i++){
			if (i % 2 == 0){//парне
			result+= i;
		}
		}
		return result;
	}
 
 
}

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