20250523 finished.

src/problem/mod.rs

@@ -670,3 +670,5 @@ mod p3355_zero_array_transformation_i;
 mod p3356_zero_array_transformation_ii;
 
 mod p3362_zero_array_transformation_iii;
+
+mod p3068_find_the_maximum_sum_of_node_values;

src/problem/p3068_find_the_maximum_sum_of_node_values.rs

@@ -0,0 +1,53 @@
+/**
+ * [3068] Find the Maximum Sum of Node Values
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn maximum_value_sum(nums: Vec<i32>, k: i32, _: Vec<Vec<i32>>) -> i64 {
+        let mut result: i64 = nums.iter().map(|x| *x as i64).sum();
+
+        let mut difference: Vec<i64> = nums.iter().map(|&x| ((x ^ k) - x) as i64).collect();
+        difference.sort_unstable_by(|a, b| b.cmp(a));
+
+        for pair in difference.chunks(2) {
+            let sum: i64 = pair.iter().sum();
+            if pair.len() != 2 || sum < 0 {
+                break;
+            }
+
+            result += sum;
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3068() {
+        assert_eq!(
+            6,
+            Solution::maximum_value_sum(vec![1, 2, 1], 3, vec![vec![0, 1], vec![0, 2]])
+        );
+        assert_eq!(
+            9,
+            Solution::maximum_value_sum(vec![2, 3], 7, vec![vec![0, 1]])
+        );
+        assert_eq!(
+            42,
+            Solution::maximum_value_sum(
+                vec![7; 6],
+                3,
+                vec![vec![0, 1], vec![0, 2], vec![0, 3], vec![0, 4], vec![0, 5]]
+            )
+        );
+    }
+}