static int NumberOfWays ( int X , int Y , int M , int N ) {
  return fact ( X + Y ) * nCr ( M , X ) * nCr ( N , Y ) ;
}

static int NumberOfWays ( int X , int Y , int M , int N ) { return fact ( X + Y ) * nCr ( M , X ) * nCr ( N , Y ) ; }
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