Added solution for 2639

Author: chirag64

02639. Find the Width of Columns of a Grid.rs

@@ -0,0 +1,21 @@
+use std::cmp::max;
+
+impl Solution {
+    // Run nested loop on grid. If we are checking 0th number in inner vector, add it to result vector. Else compare the previous highest (length) with current (length).
+    pub fn find_column_width(grid: Vec<Vec<i32>>) -> Vec<i32> {
+        let mut result = Vec::new();
+        
+        for (i, row) in grid.iter().enumerate() {
+            for (j, num) in row.iter().enumerate() {
+                let mut length = num.to_string().len();
+                if i == 0 {
+                    result.push(length as i32);
+                } else {
+                    result[j] = max(result[j], length as i32);
+                }
+            }
+        }
+        
+        return result;
+    }
+}