static int maxProduct ( int a [ ] , int n ) {
  int [ ] product = new int [ n ] ;
  int maxA [ ] = new int [ n ] ;
  int maxProd = 0 ;
  int maxArr = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    product [ i ] = a [ ( i + 1 ) % n ] * a [ ( i + ( n - 1 ) ) % n ] ;
    if ( maxProd < product [ i ] ) {
      maxProd = product [ i ] ;
    }
  }
  return maxProd ;
}

static int maxProduct ( int a [ ] , int n ) { int [ ] product = new int [ n ] ; int maxA [ ] = new int [ n ] ; int maxProd = 0 ; int maxArr = 0 ; for ( int i = 0 ; i < n ; i ++ ) { product [ i ] = a [ ( i + 1 ) % n ] * a [ ( i + ( n - 1 ) ) % n ] ; if ( maxProd < product [ i ] ) { maxProd = product [ i ] ; } } return maxProd ; }
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