static boolean solve ( int n , int [ ] a ) {
  int sum = 0 ;
  int oddCnt = 0 ;
  int evenCnt = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    sum += a [ i ] ;
    if ( ( a [ i ] & 1 ) == 0 ) evenCnt ++ ;
    else oddCnt ++ ;
  }
  if ( ( sum & 1 ) != 0 ) return false ;
  if ( ( n & 1 ) == 0 ) {
    return true ;
  }
  else {
    if ( oddCnt == 0 ) return false ;
    if ( ( evenCnt & 1 ) == 0 ) return false ;
    return true ;
  }
}

static boolean solve ( int n , int [ ] a ) { int sum = 0 ; int oddCnt = 0 ; int evenCnt = 0 ; for ( int i = 0 ; i < n ; i ++ ) { sum += a [ i ] ; if ( ( a [ i ] & 1 ) == 0 ) evenCnt ++ ; else oddCnt ++ ; } if ( ( sum & 1 ) != 0 ) return false ; if ( ( n & 1 ) == 0 ) { return true ; } else { if ( oddCnt == 0 ) return false ; if ( ( evenCnt & 1 ) == 0 ) return false ; return true ; } }
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