import java.util.Scanner; |
public class Main { |
public static void main(String[] args) { |
Scanner input = new Scanner(System.in); |
int N = input.nextInt(); |
int m = 0 ; |
|
while (N >= 1 ) |
{ |
if (N% 10 > m) |
{ |
m = N% 10 ; |
} |
N = N / 10 ; |
} |
|
System.out.print(m); |
|
input.close(); |
} |
} |