import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class owl {

	
	public static void main(String[] args) throws IOException {
		
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		String line = "";
		
		while((line = in.readLine()) != null) {
			for(int i = line.length()-1; i >= 0; i--) {
				int cislo = line.charAt(i)-'0';
				
				//System.out.println("nactene cislo " + cislo);
				
				if (cislo > 0) {
					--cislo;
					
					//System.out.println("zmensene cislo: " + cislo);
					
					String vysledek = line.substring(0, i) + cislo + line.substring(i+1);
					
					System.out.println(Integer.valueOf(vysledek));
					
					break;
					
				}
			}
		}
		
		
	}
}