public class Coins
{

    static int M(int[] v, int j)
    {
       int sol;
       int k, min;


       /* ---------------------------
	  Base cases
	  --------------------------- */
       if ( j == 0 )
       {
	   return(0);
       }

       sol = M(v, j - v[0]);    // Try one coin of denomination 0
				// with value v[0]
       min = sol + 1;		// Best solution so far...

       for ( k = 1; k < v.length; k++ )
       {
          /* --------------------------------------------
	     Check if we can use the k-th denomination
	     -------------------------------------------- */
          if ( v[k] <= j )
          {
             /* ------------------------
	        Divide step
	        ------------------------ */
             sol = M(v, j - v[k]);    // Try one coin of denomination k
				      // with value v[k]

	     /* ---------------------------------------
	        Conquer: solve original problem using
	        solution from smaller problems
	        --------------------------------------- */
	     if ( sol + 1 < min )
	        min = sol + 1;	// New best solution so far
          }
       }

       return(min);   // Return best solution
   }


   public static void main(String[] args)
   {
       int[] v = {1, 5, 10, 25, 50, 100, 500};

       int C, r;

       C = 55;                  // Around 53 it starts to slow...
       r = M(v, C);

       System.out.println("Min # coins to make change for " + C + " = " + r);
   }

}