public static void solve ( ) {
  int n = sc . nextInt ( ) ;
  double k = sc . nextDouble ( ) ;
  double [ ] p = new double [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    p [ i ] = sc . nextDouble ( ) ;
  }
  long ans = 0 ;
  double per , x = 0 ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    per = p [ i ] * 100 / p [ i - 1 ] ;
    if ( per > k ) {
      x = Math . ceil ( p [ i ] * 100 / k - p [ i - 1 ] ) ;
      ans += x ;
      p [ i - 1 ] += x ;
    }
    p [ i ] += p [ i - 1 ] ;
  }
  System . out . println ( ans ) ;
}

public static void solve ( ) { int n = sc . nextInt ( ) ; double k = sc . nextDouble ( ) ; double [ ] p = new double [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { p [ i ] = sc . nextDouble ( ) ; } long ans = 0 ; double per , x = 0 ; for ( int i = 1 ; i < n ; i ++ ) { per = p [ i ] * 100 / p [ i - 1 ] ; if ( per > k ) { x = Math . ceil ( p [ i ] * 100 / k - p [ i - 1 ] ) ; ans += x ; p [ i - 1 ] += x ; } p [ i ] += p [ i - 1 ] ; } System . out . println ( ans ) ; }
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