Merge pull request #224 from pranesh6876/patch-1

Hacktoberfest 2023

Author: kishanrajput23

Zigzag_Conversion.java

@@ -0,0 +1,19 @@
+class Solution {
+public String convert(String s, int nRows) {
+    char[] c = s.toCharArray();
+    int len = c.length;
+    StringBuffer[] sb = new StringBuffer[nRows];
+    for (int i = 0; i < sb.length; i++) sb[i] = new StringBuffer();
+
+    int i = 0;
+    while (i < len) {
+        for (int idx = 0; idx < nRows && i < len; idx++) // vertically down
+            sb[idx].append(c[i++]);
+        for (int idx = nRows-2; idx >= 1 && i < len; idx--) // obliquely up
+            sb[idx].append(c[i++]);
+    }
+    for (int idx = 1; idx < sb.length; idx++)
+        sb[0].append(sb[idx]);
+    return sb[0].toString();
+}
+}