Largest 2 elements in Rust added (#5756)

Co-authored-by: Riyazul555 <riyazulislam2003@gmail.com>

program/program/find-the-largest-two-elements-in-an-array/find_the_largest_two_elements_in_an_array.rs

@@ -0,0 +1,30 @@
+fn find_largest_two_elements(arr: &[i32]) -> (i32, i32) {
+    if arr.len() < 2 {
+        panic!("Array must contain at least two elements");
+    }
+
+    let mut largest = arr[0];
+    let mut second_largest = arr[1];
+
+    if second_largest > largest {
+        std::mem::swap(&mut largest, &mut second_largest);
+    }
+
+    for &num in &arr[2..] {
+        if num > largest {
+            second_largest = largest;
+            largest = num;
+        } else if num > second_largest {
+            second_largest = num;
+        }
+    }
+
+    (largest, second_largest)
+}
+
+fn main() {
+    let arr = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5];
+    let (largest, second_largest) = find_largest_two_elements(&arr);
+    println!("The largest element is: {}", largest);
+    println!("The second largest element is: {}", second_largest);
+}