20241016 finished.

src/problem/mod.rs

@@ -265,3 +265,4 @@ mod p3158_find_the_xor_of_numbers_which_appear_twice;
 mod p1884_egg_drop_with_2_eggs_and_n_floors;
 mod p887_super_egg_drop;
 mod p3200_maximum_height_of_a_triangle;
+mod p3194_minimum_average_of_smallest_and_largest_elements;

src/problem/p3194_minimum_average_of_smallest_and_largest_elements.rs

@@ -0,0 +1,37 @@
+/**
+ * [3194] Minimum Average of Smallest and Largest Elements
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn minimum_average(nums: Vec<i32>) -> f64 {
+        let mut nums: Vec<f64> = nums.into_iter().map(|x| x as f64).collect();
+        nums.sort_by(|a, b| a.partial_cmp(b).unwrap());
+        let n = nums.len();
+
+        let mut result = f64::MAX;
+
+        for i in 0..n / 2 {
+            result = result.min((nums[i] + nums[n - i - 1]) / 2f64);
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3194() {
+        assert_eq!(5.5, Solution::minimum_average(vec![7, 8, 3, 4, 15, 13, 4, 1]));
+        assert_eq!(5.5, Solution::minimum_average(vec![1, 9, 8, 3, 10, 5]));
+        assert_eq!(5.0, Solution::minimum_average(vec![1, 2, 3, 7, 8, 9]));
+    }
+}