source_code: 	import java.io.BufferedReader;
  	import java.io.IOException;
  	import java.io.InputStreamReader;
  	import java.util.ArrayList;
  	import java.util.Arrays;
  	import java.util.Collections;
  	import java.util.Comparator;
  	import java.util.HashMap;
  	import java.util.HashSet;
  	import java.util.LinkedList;
  	import java.util.List;
  	import java.util.Map;
  	import java.util.PriorityQueue;
  	import java.util.Queue;
  	import java.util.Random;
  	import java.util.Set;
  	import java.util.Stack;
  	
  	public class test {
  		public static void main(String[] args) throws InterruptedException {
  			//new careercup().run();
  			//new CC().run();
  			//System.out.println(Integer.MAX_VALUE);
  			try{
  				BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  				br.readLine();
  				System.out.println(25);
  				
  			}catch(IOException io){
  				io.printStackTrace();
  			}
  		}
  		
  	
  	}
  