3507. 移除最小数对使数组有序 I

src/main.rs

@@ -1,31 +1,42 @@
 struct Solution;
 mod arr;
 impl Solution {
-    pub fn maximum_profit(prices: Vec<i32>, k: i32) -> i64 {
-        let k = k as usize;
-        // 0 无 1 持有 2 做空
-        let mut dp = vec![vec![vec![-0x3f3f3f3f_i64;3];k + 1]; prices.len()];
-        dp[0][0][0] = 0;
-        for i in 1..=k {
-            dp[0][i][0] = 0;
-            dp[0][i][1] = -prices[0] as i64;
-            dp[0][i][2] = prices[0] as i64;
-        }
-        for i in 1..prices.len() {
-            dp[i][0][1] = dp[i-1][0][1];
-            dp[i][0][2] = dp[i-1][0][2];
-            dp[i][0][0] = dp[i-1][0][0].max(dp[i-1][0][1] + prices[i] as i64).max(dp[i-1][0][2] - prices[i] as i64);
-            for j in 1..=k {
-                dp[i][j][0] = dp[i-1][j][0].max(dp[i-1][j][1] + prices[i] as i64).max(dp[i-1][j][2] - prices[i] as i64);
-                dp[i][j][1] = dp[i-1][j][1].max(dp[i-1][j-1][0] - prices[i] as i64);
-                dp[i][j][2] = dp[i-1][j][2].max(dp[i-1][j-1][0] + prices[i] as i64);
+    pub fn minimum_pair_removal(mut nums: Vec<i32>) -> i32 {
+        let mut all_clear = false;
+        let mut ans = -1;
+        while !all_clear{
+            ans += 1;
+            all_clear = true;
+            let (mut index_a, mut index_b)= (0,0);
+            let mut min_sum = 1e9 as i32;
+            let mut start = 0;
+            let mut last = start;
+            for i in 0 .. nums.len() {
+                if nums[i] != -10000001 {
+                    start = i;
+                    break;
+                }
             }
+            for i in start + 1..nums.len() {
+                if nums[i] == -10000001 {
+                    continue;
+                }
+                if nums[i] < nums[last] {
+                    all_clear = false;
+                }
+                if nums[last] + nums[i] < min_sum {
+                    (index_a, index_b) = (last, i);
+                    min_sum = nums[last] + nums[i];
+                }
+                last = i;
+            }
+            nums[index_a] = min_sum;
+            nums[index_b] = -10000001;
         }
-        println!("{:?}",dp);
-        dp.last().unwrap().last().unwrap()[0]
+        ans
     }
 }
 fn main() {
-    let result = Solution::maximum_profit(vec![5,10,9], 1);
+    let result = Solution::minimum_pair_removal(vec![498,107,626,-563,-760,554,-196,-158,185,-63]);
     println!("{:?}", result);
 }