#include<bits/stdc++.h>
using namespace std;

using ll = long long;

#define TYPE_OF( VAR ) remove_const<remove_reference<decltype( VAR )>::type >::type
#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr ) 
#define CIN( LL , A ) LL A; cin >> A 
#define ASSERT( A , MIN , MAX ) assert( MIN <= A && A <= MAX ) 
#define CIN_ASSERT( A , MIN , MAX ) CIN( TYPE_OF( MAX ) , A ); ASSERT( A , MIN , MAX ) 
#define QUIT return 0 
#define RETURN( ANSWER ) cout << ( ANSWER ) << "\n"; QUIT 

#define POWER( ANSWER , ARGUMENT , EXPONENT , MODULO )			\
  TYPE_OF( ARGUMENT ) ANSWER = 1;					\
  {									\
    TYPE_OF( ARGUMENT ) ARGUMENT_FOR_SQUARE_FOR_POWER = ARGUMENT;	\
    TYPE_OF( EXPONENT ) EXPONENT_FOR_SQUARE_FOR_POWER = EXPONENT;	\
    while( EXPONENT_FOR_SQUARE_FOR_POWER != 0 ){			\
      if( EXPONENT_FOR_SQUARE_FOR_POWER % 2 == 1 ){			\
	ANSWER = ( ANSWER * ARGUMENT_FOR_SQUARE_FOR_POWER ) % MODULO;	\
      }									\
      ARGUMENT_FOR_SQUARE_FOR_POWER = ( ARGUMENT_FOR_SQUARE_FOR_POWER * ARGUMENT_FOR_SQUARE_FOR_POWER ) % MODULO; \
      EXPONENT_FOR_SQUARE_FOR_POWER /= 2;				\
    }									\
  }									\




int main()
{
  UNTIE;
  constexpr const ll P = 998244353;
  constexpr const ll bound = 1000000000000000000;
  CIN_ASSERT( N , 1 , bound );
  CIN_ASSERT( M , 1 , bound );
  CIN_ASSERT( K , 1 , bound );
  // c[n,m,k] := (1からmまでの整数からなる長さnの列でmax - min < kであるものの総数)
  // = max( 0 , m - k ) * ( k ^ n - ( k - 1 ) ^ n ) + min( m , k ) ^ n
  // = m > k ? ( m - k + 1 ) * k ^ n - ( m - k ) * ( k - 1 ) ^ n : m ^ n
  N *= 2;
  if( M <= K ){
    POWER( answer , M , N , P );
    RETURN( answer );
  }
  M = ( M - K ) % P;
  POWER( K_power , K , N , P );
  POWER( K_minus_power , K - 1 , N , P );
  RETURN( ( ( M + 1 ) * K_power + P - ( ( M * K_minus_power ) % P ) ) % P );
}