The next number

import java.util.Scanner;

public class Main { public static void main(String[] args) { String s = new Scanner(System.in).next(); StringBuilder sb = new StringBuilder();

int n = s.length(), c = 1;
for(int i=n-1; i>-1; i--) {
  int v = s.charAt(i) - '0' + c;
  c = v / 10;
  sb.append(v%10);
  if(c == 0) {
    if(i > 0) sb.append(new StringBuilder(s.substring(0, i)).reverse());
    break;
  }
}
if(c == 1) sb.append(1);
System.out.println(sb.reverse().toString());

} }