add 2639

Author: fishercoder1534

Diff for: paginated_contents/algorithms/3rd_thousand/README.md

@@ -27,6 +27,7 @@
 | 2644 | [Find the Maximum Divisibility Score](https://leetcode.com/problems/find-the-maximum-divisibility-score/)                                                                                       | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2644.java)                                       |                                      | Easy                           |
 | 2643 | [Row With Maximum Ones](https://leetcode.com/problems/row-with-maximum-ones/)                                                                                       | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2643.java)                                       |                                      | Easy                           |
 | 2641 | [Cousins in Binary Tree II](https://leetcode.com/problems/cousins-in-binary-tree-ii/)                                                                                       | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2641.java)                                       |                                      | Medium                         |Tree, BFS, HashTable
+| 2639 | [Find the Width of Columns of a Grid](https://leetcode.com/problems/find-the-width-of-columns-of-a-grid/)                                                                                       | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2639.java)                                       |                                      | Easy                           |
 | 2605 | [Form Smallest Number From Two Digit Arrays](https://leetcode.com/problems/form-smallest-number-from-two-digit-arrays/)                                                                                      | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2605.java)                                       |                                      | Easy                           |
 | 2609 | [Find the Longest Balanced Substring of a Binary String](https://leetcode.com/problems/find-the-longest-balanced-substring-of-a-binary-string/)                                                                                      | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2609.java)                                       |                                      | Easy                           |
 | 2600 | [K Items With the Maximum Sum](https://leetcode.com/problems/k-items-with-the-maximum-sum/)                                                                                       | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2600.java)                                       |                                      | Easy                           |

Diff for: src/main/java/com/fishercoder/solutions/thirdthousand/_2639.java

@@ -0,0 +1,17 @@
+package com.fishercoder.solutions.thirdthousand;
+
+public class _2639 {
+    public static class Solution1 {
+        public int[] findColumnWidth(int[][] grid) {
+            int[] ans = new int[grid[0].length];
+            for (int j = 0; j < grid[0].length; j++) {
+                int width = 0;
+                for (int i = 0; i < grid.length; i++) {
+                    width = Math.max(width, String.valueOf(grid[i][j]).length());
+                }
+                ans[j] = width;
+            }
+            return ans;
+        }
+    }
+}