static long powerStrings ( String sa , String sb ) {
  long a = 0 , b = 0 ;
  for ( int i = 0 ;
  i < sa . length ( ) ;
  i ++ ) {
    a = ( a * 10 + ( sa . charAt ( i ) - '0' ) ) % MOD ;
  }
  for ( int i = 0 ;
  i < sb . length ( ) ;
  i ++ ) {
    b = ( b * 10 + ( sb . charAt ( i ) - '0' ) ) % ( MOD - 1 ) ;
  }
  return powerLL ( a , b ) ;
}

static long powerStrings ( String sa , String sb ) { long a = 0 , b = 0 ; for ( int i = 0 ; i < sa . length ( ) ; i ++ ) { a = ( a * 10 + ( sa . charAt ( i ) - '0' ) ) % MOD ; } for ( int i = 0 ; i < sb . length ( ) ; i ++ ) { b = ( b * 10 + ( sb . charAt ( i ) - '0' ) ) % ( MOD - 1 ) ; } return powerLL ( a , b ) ; }
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