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Author: 17tanya

String/ZigZag_Conversion.java

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+//LeetCode 6. ZigZag Conversion
+//Question - https://leetcode.com/problems/zigzag-conversion/
+
+class Solution {
+    public String convert(String s, int numRows) {
+        StringBuffer res[] = new StringBuffer[numRows];
+        
+        for(int i = 0 ; i < numRows ; i++){
+            res[i] = new StringBuffer();    
+        }
+        
+        int i = 0;
+        while(i < s.length()){
+            //going down
+            for(int ind = 0 ; ind < numRows && i < s.length() ; ind++){
+                res[ind].append(s.charAt(i++));
+            }
+            //going up
+            for(int ind = numRows - 2 ; ind >= 1 && i < s.length() ; ind--){
+                res[ind].append(s.charAt(i++));
+            }
+        }
+        
+        for(i = 1 ; i < numRows ; i++){
+            res[0].append(res[i]);
+        }
+        
+        return res[0].toString();
+    }
+}