20240903 finished.

src/problem/mod.rs

@@ -224,3 +224,4 @@ mod p3153_sum_of_digit_differences_of_all_pairs;
 mod p3127_make_a_square_with_the_same_color;
 mod p1450_number_of_students_doing_homework_at_a_given_time;
 mod p2024_maximize_the_confusion_of_an_exam;
+mod p2708_maximum_strength_of_a_group;

src/problem/p2708_maximum_strength_of_a_group.rs

@@ -0,0 +1,62 @@
+/**
+ * [2708] Maximum Strength of a Group
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn max_strength(nums: Vec<i32>) -> i64 {
+        if nums.len() == 1 {
+            return nums[0] as i64;
+        }
+
+        let mut nums = nums;
+        nums.sort();
+
+        let mut now = 0;
+        let mut result = 1;
+        let mut found = false;
+
+        while now < nums.len() {
+            if nums[now] > 0 {
+                break;
+            }
+
+            if now + 1 < nums.len() && nums[now] * nums[now + 1] > 0 {
+                let r = nums[now] * nums[now + 1];
+                result *= r as i64;
+                found = true;
+                now += 2;
+            } else { 
+                now += 1;
+            }
+        }
+
+        while now < nums.len() {
+            result *= nums[now] as i64;
+            found = true;
+
+            now += 1;
+        }
+
+        match found {
+            true => result,
+            false => 0
+        }
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2708() {
+        assert_eq!(20, Solution::max_strength(vec![-4, -5, -4]));
+        assert_eq!(1350, Solution::max_strength(vec![3, -1, -5, 2, 5, -9]));
+    }
+}