public static void main ( String [ ] args ) {
  FastScanner fs = new FastScanner ( ) ;
  int n = fs . nextInt ( ) ;
  int ans = 0 ;
  int b = n ;
  int sum = 0 ;
  while ( b > 0 ) {
    sum += b % 10 ;
    b /= 10 ;
  }
  int to = ( 4 - sum % 4 ) % 4 ;
  if ( to == 0 ) ans = n ;
  else if ( to + n % 10 <= 9 ) ans = n + to ;
  else {
    ans = ( n / 10 + 1 ) * 10 ;
    b = ans ;
    sum = 0 ;
    while ( b > 0 ) {
      sum += b % 10 ;
      b /= 10 ;
    }
    to = ( 4 - sum % 4 ) % 4 ;
    ans = ans + to ;
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { FastScanner fs = new FastScanner ( ) ; int n = fs . nextInt ( ) ; int ans = 0 ; int b = n ; int sum = 0 ; while ( b > 0 ) { sum += b % 10 ; b /= 10 ; } int to = ( 4 - sum % 4 ) % 4 ; if ( to == 0 ) ans = n ; else if ( to + n % 10 <= 9 ) ans = n + to ; else { ans = ( n / 10 + 1 ) * 10 ; b = ans ; sum = 0 ; while ( b > 0 ) { sum += b % 10 ; b /= 10 ; } to = ( 4 - sum % 4 ) % 4 ; ans = ans + to ; } System . out . println ( ans ) ; }
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