public static void main ( String [ ] args ) throws Exception {
  BufferedReader stdReader = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  String c = stdReader . readLine ( ) ;
  String vals = stdReader . readLine ( ) ;
  long [ ] ls = new long [ Integer . valueOf ( c ) ] ;
  String [ ] ss = vals . split ( " " ) ;
  long total = 0 ;
  long [ ] sunu = new long [ Integer . valueOf ( c ) ] ;
  for ( int i = 0 ;
  i < ls . length ;
  i ++ ) {
    long v = Long . valueOf ( ss [ i ] ) ;
    ls [ i ] = v ;
    total += v ;
    sunu [ i ] = total ;
  }
  long min = 0 ;
  for ( int i = 0 ;
  i < ls . length - 1 ;
  i ++ ) {
    long arai = total - sunu [ i ] ;
    long current = Math . abs ( arai - sunu [ i ] ) ;
    if ( i == 0 ) {
      min = current ;
    }
    min = Math . min ( min , current ) ;
  }
  System . out . println ( min ) ;
}

public static void main ( String [ ] args ) throws Exception { BufferedReader stdReader = new BufferedReader ( new InputStreamReader ( System . in ) ) ; String c = stdReader . readLine ( ) ; String vals = stdReader . readLine ( ) ; long [ ] ls = new long [ Integer . valueOf ( c ) ] ; String [ ] ss = vals . split ( " ▁ " ) ; long total = 0 ; long [ ] sunu = new long [ Integer . valueOf ( c ) ] ; for ( int i = 0 ; i < ls . length ; i ++ ) { long v = Long . valueOf ( ss [ i ] ) ; ls [ i ] = v ; total += v ; sunu [ i ] = total ; } long min = 0 ; for ( int i = 0 ; i < ls . length - 1 ; i ++ ) { long arai = total - sunu [ i ] ; long current = Math . abs ( arai - sunu [ i ] ) ; if ( i == 0 ) { min = current ; } min = Math . min ( min , current ) ; } System . out . println ( min ) ; }
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