public static int [ ] countSum ( int arr [ ] , int n ) {
  int result = 0 ;
  int [ ] countODD = new int [ n + 1 ] ;
  int [ ] countEVEN = new int [ n + 1 ] ;
  countODD [ 0 ] = 0 ;
  countEVEN [ 0 ] = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    if ( arr [ i - 1 ] % 2 == 0 ) {
      countEVEN [ i ] = countEVEN [ i - 1 ] + countEVEN [ i - 1 ] + 1 ;
      countODD [ i ] = countODD [ i - 1 ] + countODD [ i - 1 ] ;
    }
    else {
      countEVEN [ i ] = countEVEN [ i - 1 ] + countODD [ i - 1 ] ;
      countODD [ i ] = countODD [ i - 1 ] + countEVEN [ i - 1 ] + 1 ;
    }
  }
  int [ ] ans = new int [ 2 ] ;
  ans [ 0 ] = countEVEN [ n ] ;
  ans [ 1 ] = countODD [ n ] ;
  return ans ;
}

public static int [ ] countSum ( int arr [ ] , int n ) { int result = 0 ; int [ ] countODD = new int [ n + 1 ] ; int [ ] countEVEN = new int [ n + 1 ] ; countODD [ 0 ] = 0 ; countEVEN [ 0 ] = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { if ( arr [ i - 1 ] % 2 == 0 ) { countEVEN [ i ] = countEVEN [ i - 1 ] + countEVEN [ i - 1 ] + 1 ; countODD [ i ] = countODD [ i - 1 ] + countODD [ i - 1 ] ; } else { countEVEN [ i ] = countEVEN [ i - 1 ] + countODD [ i - 1 ] ; countODD [ i ] = countODD [ i - 1 ] + countEVEN [ i - 1 ] + 1 ; } } int [ ] ans = new int [ 2 ] ; ans [ 0 ] = countEVEN [ n ] ; ans [ 1 ] = countODD [ n ] ; return ans ; }
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