source_code: import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.OutputStreamWriter;
  import java.io.PrintWriter;
  import java.math.BigInteger;
  import java.util.StringTokenizer;
  
  
  public class A {
  
  	static StringTokenizer st;
  	static BufferedReader br;
  	static PrintWriter pw;
  	public static void main(String[] args) throws IOException {
  		br = new BufferedReader(new InputStreamReader(System.in));
  		pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
  		BigInteger a = new BigInteger(next());
  		System.out.println(BigInteger.valueOf(5).modPow(a, BigInteger.valueOf(100)));
  		pw.close();
  	}
  	private static int nextInt() throws IOException {
  		return Integer.parseInt(next());
  	}
  	private static long nextLong() throws IOException {
  		return Long.parseLong(next());
  	}
  	private static double nextDouble() throws IOException {
  		return Double.parseDouble(next());
  	}
  	private static String next() throws IOException {
  		while (st==null || !st.hasMoreTokens())
  			st = new StringTokenizer(br.readLine());
  		return st.nextToken();
  	}
  }
  