static int fastPow ( int N , int K ) {
  if ( K == 0 ) return 1 ;
  int temp = fastPow ( N , K / 2 ) ;
  if ( K % 2 == 0 ) return temp * temp ;
  else return N * temp * temp ;
}

static int fastPow ( int N , int K ) { if ( K == 0 ) return 1 ; int temp = fastPow ( N , K / 2 ) ; if ( K % 2 == 0 ) return temp * temp ; else return N * temp * temp ; }
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