static int DreamoonandStairs ( int n , int m ) {
  int val = n / 2 ;
  if ( n % 2 != 0 ) {
    val ++ ;
  }
  if ( val % m != 0 ) {
    val += m - ( val % m ) ;
  }
  return val ;
}

static int DreamoonandStairs ( int n , int m ) { int val = n / 2 ; if ( n % 2 != 0 ) { val ++ ; } if ( val % m != 0 ) { val += m - ( val % m ) ; } return val ; }
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