20241026 finished.

src/problem/mod.rs

@@ -276,3 +276,5 @@ mod p983_minimum_cost_for_tickets;
 mod p997_find_the_town_judge;
 
 mod p3180_maximum_total_reward_using_operations_i;
+
+mod p3181_maximum_total_reward_using_operations_ii;

src/problem/p3181_maximum_total_reward_using_operations_ii.rs

@@ -0,0 +1,47 @@
+/**
+ * [3181] Maximum Total Reward Using Operations II
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn max_total_reward(reward_values: Vec<i32>) -> i32 {
+        let mut reward_values: Vec<usize> = reward_values.into_iter().map(|x| x as usize).collect();
+        reward_values.sort_unstable();
+        reward_values.dedup();
+
+        let max_value = *reward_values.last().unwrap();
+        let n = reward_values.len();
+
+        if n >= 2 && max_value - 1 == reward_values[n - 2] {
+            return (2 * max_value - 1) as i32;
+        }
+
+        let mut dp = vec![false; 2 * max_value + 1];
+        dp[0] = true;
+
+        unsafe {
+            for v in reward_values {
+                for i in (v..v << 1).rev() {
+                    *(dp.get_unchecked_mut(i)) |= *dp.get_unchecked(i - v);
+                }
+            }
+        }
+
+        dp.iter().enumerate().rfind(|(_, &x)| x).unwrap().0 as i32
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3181() {
+        assert_eq!(4, Solution::max_total_reward(vec![1, 1, 3, 3]));
+        assert_eq!(11, Solution::max_total_reward(vec![1, 6, 4, 3, 2]));
+    }
+}