added wave pattern

findunique.java

@@ -0,0 +1,22 @@
+public class Solution{  
+
+    public static int findUnique(int[] arr){
+		//Your code goes here
+        for(int i=0;i<arr.length;i++){
+            boolean flag = true;
+            for(int j=0;j<arr.length;j++){
+                if(i==j){
+                    continue;
+                }
+                if(arr[i]==arr[j]){
+                    flag = false;
+                    break;
+                }
+            }
+            if(flag){
+                return arr[i];
+            }
+        }
+        return -1;
+    }
+}

wavePrint.java

@@ -0,0 +1,44 @@
+
+public class wavePrint {
+	public static void wavePrintFun(int input[][]){
+
+		// Write your code here
+        boolean flag = false;
+        for(int j=0;j<input[0].length;j++){
+            flag = !flag;
+            if(flag){
+                for(int i=0;i<input.length;i++){
+                    //  System.out.print(i +" "+  j+" "+"XX");
+                    System.out.print(input[i][j]);
+                }
+                System.out.println();
+
+            }
+            else{
+                 for(int i=input.length-1;i>=0;i--){
+                  // System.out.print(i +" "+  j+" "+"XX");
+                   System.out.print(input[i][j]);
+                }
+                System.out.println();
+
+            }
+
+
+
+        }
+
+
+	}
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		int arr[][] = {
+				{1,2,3},
+				{4,5,6},
+				{7,8,9},
+				{10,11,12}
+		};
+		wavePrintFun(arr);
+	}
+
+}