static void findSubsequence ( int arr [ ] , int n ) {
  int sign [ ] = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( arr [ i ] > 0 ) sign [ i ] = 1 ;
    else sign [ i ] = - 1 ;
  }
  int k = 0 ;
  int result [ ] = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int cur = arr [ i ] ;
    int j = i ;
    while ( j < n && sign [ i ] == sign [ j ] ) {
      cur = Math . max ( cur , arr [ j ] ) ;
      ++ j ;
    }
    result [ k ++ ] = cur ;
    i = j - 1 ;
  }
  for ( int i = 0 ;
  i < k ;
  i ++ ) System . out . print ( result [ i ] + " " ) ;
  System . out . print ( "\n" ) ;
}

static void findSubsequence ( int arr [ ] , int n ) { int sign [ ] = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { if ( arr [ i ] > 0 ) sign [ i ] = 1 ; else sign [ i ] = - 1 ; } int k = 0 ; int result [ ] = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { int cur = arr [ i ] ; int j = i ; while ( j < n && sign [ i ] == sign [ j ] ) { cur = Math . max ( cur , arr [ j ] ) ; ++ j ; } result [ k ++ ] = cur ; i = j - 1 ; } for ( int i = 0 ; i < k ; i ++ ) System . out . print ( result [ i ] + " ▁ " ) ; System . out . print ( " \n " ) ; }
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