Merge pull request #132 from dpacmen/patch-5

Rodcuting dp approach in java

Dynamic Programming/rod_cutting.java

@@ -0,0 +1,33 @@
+/*  A Dynamic Programming solution for Rod cutting problem
+    Returns the best obtainable price for a rod of
+	length n and price[] as prices of different pieces */
+
+public class RodCutting
+{
+	
+	private static int cutRod(int price[],int n)
+	{
+		int val[] = new int[n+1];
+		val[0] = 0;
+
+		for (int i = 1; i<=n; i++)
+		{
+			int max_val = Integer.MIN_VALUE;
+			for (int j = 0; j < i; j++)
+				max_val = Math.max(max_val,price[j] + val[i-j-1]);
+		  
+       val[i] = max_val;
+		}
+
+		return val[n];
+	}
+
+	//main function to test
+	public static void main(String args[])
+	{
+		int arr[] = new int[] {2, 5, 13, 19, 20};
+		int size = arr.length;
+		System.out.println("Maximum Obtainable Value is " +
+							cutRod(arr, size));
+	}
+}