static int count ( int S [ ] , int m , int n ) {
  if ( n == 0 ) return 1 ;
  if ( n < 0 ) return 0 ;
  if ( m <= 0 && n >= 1 ) return 0 ;
  return count ( S , m - 1 , n ) + count ( S , m , n - S [ m - 1 ] ) ;
}

static int count ( int S [ ] , int m , int n ) { if ( n == 0 ) return 1 ; if ( n < 0 ) return 0 ; if ( m <= 0 && n >= 1 ) return 0 ; return count ( S , m - 1 , n ) + count ( S , m , n - S [ m - 1 ] ) ; }
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