source_code: /*
       * Code Author: Akshay Miterani
       * DA-IICT
       */
      import java.io.*;
      import java.util.*;
      
       
      public class MainY {
       
      	static double eps=(double)1e-6;
      	static long mod=(int)1e9+7;
      	static boolean f=true;
      	public static void main(String args[]){
      		InputReader in = new InputReader(System.in);
      		OutputStream outputStream = System.out;
      		PrintWriter out = new PrintWriter(outputStream);
      		//----------My Code Starts Here----------
      		long n=in.nextLong();
      		if(n==1){
      			System.out.println("5");
      		}
      		else{
      			System.out.println("25");
      		}
      		out.close();
      		//---------------The End------------------
      	}
      	
      	static class Pair implements Comparable<Pair>{
      		int r1=-1;
      		int r2=-1;
      		int extra=0;
  			@Override
  			public int compareTo(Pair arg0) {
  				// TODO Auto-generated method stub
  				return 0;
  			}
      	}
      	
      	static class InputReader {
      	    public BufferedReader reader;
      	    public StringTokenizer tokenizer;
       
      	    public InputReader(InputStream inputstream) {
      	      reader = new BufferedReader(new InputStreamReader(inputstream));
      	      tokenizer = null;
      	    }
      	    
      	    public String nextLine(){
      	    	String fullLine=null;
      	    	while (tokenizer == null || !tokenizer.hasMoreTokens()) {
      	            try {
      	              fullLine=reader.readLine();
      	            } catch (IOException e) {
      	              throw new RuntimeException(e);
      	            }
      	            return fullLine;
      	          }
      	          return fullLine;
      	    }
      		public String next() {
      	      while (tokenizer == null || !tokenizer.hasMoreTokens()) {
      	        try {
      	          tokenizer = new StringTokenizer(reader.readLine());
      	        } catch (IOException e) {
      	          throw new RuntimeException(e);
      	        }
      	      }
      	      return tokenizer.nextToken();
      	    }
      		public long nextLong() {
      		      return Long.parseLong(next());
      		    }
      	    public int nextInt() {
      	      return Integer.parseInt(next());
      	    }
      	  }
      } 