Merge pull request #79 from arpitjain22june/patch-11

Create PatternHourGlass.java

Author: srsandy

Practice Problems/Patterns/PatternHourGlass/PatternHourGlass.java

@@ -0,0 +1,60 @@
+//5
+//5 4 3 2 1 0 1 2 3 4 5 
+//  4 3 2 1 0 1 2 3 4 
+//    3 2 1 0 1 2 3 
+//      2 1 0 1 2 
+//        1 0 1 
+//          0 
+//        1 0 1 
+//      2 1 0 1 2 
+//    3 2 1 0 1 2 3 
+//  4 3 2 1 0 1 2 3 4 
+//5 4 3 2 1 0 1 2 3 4 5 
+
+import java.util.Scanner;
+
+public class PatternHourGlass {
+
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in);
+		int n = 0;
+		if (sc.hasNext()) {
+			n = sc.nextInt();
+		}
+		int nr=2*n+1;
+		int nst=nr;
+		int nsp=0;
+		int row=1;
+		int val;
+		while(row<=nr) {
+			if(row<=nr/2+1) {
+			val=n-row+1;
+			}else {
+				val=row-nr/2-1;
+			}
+			for(int csp = 1; csp<=nsp;csp++) {
+				System.out.print(" ");
+			}
+			for(int cst = 1; cst<=nst;cst++) {
+				if(cst<nst/2+1) {
+				System.out.print(val--+" ");
+				}else if(cst==nst/2+1){					
+					System.out.print(val +" ");
+				}else {
+					System.out.print(++val +" ");
+				}
+			}
+			System.out.println();
+			if(row<=nr/2) {
+				nsp+=2;
+				nst-=2;
+			}else {
+				nsp-=2;
+				nst+=2;
+			}
+			row++;
+			
+		}
+	}
+
+}

Practice Problems/Patterns/PatternHourGlass/Readme.md

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+Take N as input. For a value of N=5, we wish to draw the following pattern :
+
+                          5 4 3 2 1 0 1 2 3 4 5
+                            4 3 2 1 0 1 2 3 4 
+                              3 2 1 0 1 2 3 
+                                2 1 0 1 2 
+                                  1 0 1 
+                                    0 
+                                  1 0 1 
+                                2 1 0 1 2 
+                              3 2 1 0 1 2 3 
+                            4 3 2 1 0 1 2 3 4 
+                          5 4 3 2 1 0 1 2 3 4 5
+Input Format
+Take N as input.
+
+Constraints
+N <= 20
+
+Output Format
+Pattern should be printed with a space between every two values.
+
+Sample Input
+5
+