add solution in rust: 111. Minimum Depth of Binary Tree

Signed-off-by: rajput-hemant <rajput.hemant2001@gmail.com>

Author: rajput-hemant

src/0101-0200/111 - Minimum Depth of Binary Tree/minimum_depth_of_binary_tree.rs

@@ -0,0 +1,18 @@
+impl Solution {
+    pub fn min_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
+        match root {
+            Some(node) => {
+                let left = Self::min_depth(node.borrow().left.clone());
+                let right = Self::min_depth(node.borrow().right.clone());
+
+                if left == 0 || right == 0 {
+                    left.max(right) + 1
+                } else {
+                    left.min(right) + 1
+                }
+            }
+
+            None => 0,
+        }
+    }
+}