static int calculatePower ( int b , int e ) {
  int ans = 1 ;
  while ( e > 0 ) {
    if ( e % 2 == 1 ) ans = ans * b ;
    e = e / 2 ;
    b = b * b ;
  }
  return ans ;
}

static int calculatePower ( int b , int e ) { int ans = 1 ; while ( e > 0 ) { if ( e % 2 == 1 ) ans = ans * b ; e = e / 2 ; b = b * b ; } return ans ; }
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