public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int a = sc . nextInt ( ) ;
  int b = sc . nextInt ( ) ;
  int c = Math . abs ( b ) ;
  c = c % n ;
  if ( b < 0 ) {
    c = - c ;
  }
  if ( c < 0 ) {
    c = n - Math . abs ( c ) ;
    int d = a - 1 ;
    int f = Math . abs ( c ) ;
    f = f + d + 1 ;
    if ( f > n ) {
      f = f - n ;
    }
    System . out . println ( f ) ;
  }
  else if ( c > 0 ) {
    int d = a - 1 ;
    int f = Math . abs ( c ) ;
    f = f + d + 1 ;
    if ( f > n ) {
      f = f - n ;
    }
    System . out . println ( f ) ;
  }
  else {
    System . out . println ( a ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int a = sc . nextInt ( ) ; int b = sc . nextInt ( ) ; int c = Math . abs ( b ) ; c = c % n ; if ( b < 0 ) { c = - c ; } if ( c < 0 ) { c = n - Math . abs ( c ) ; int d = a - 1 ; int f = Math . abs ( c ) ; f = f + d + 1 ; if ( f > n ) { f = f - n ; } System . out . println ( f ) ; } else if ( c > 0 ) { int d = a - 1 ; int f = Math . abs ( c ) ; f = f + d + 1 ; if ( f > n ) { f = f - n ; } System . out . println ( f ) ; } else { System . out . println ( a ) ; } }
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