add 1423

fishercoder1534 · fishercoder1534 · commit 2922a4b407a6 · 2020-04-26T09:46:11.000-07:00
diff --git a/README.md b/README.md
@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ &#9733;
 
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
+|1423|[Maximum Points You Can Obtain from Cards](https://leetcode.com/problems/maximum-points-you-can-obtain-from-cards/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1423.java) | |Medium|Array, DP, Sliding Window|
 |1422|[Maximum Score After Splitting a String](https://leetcode.com/problems/maximum-score-after-splitting-a-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1422.java) | |Easy|String|
 |1418|[Display Table of Food Orders in a Restaurant](https://leetcode.com/problems/display-table-of-food-orders-in-a-restaurant/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1418.java) | |Medium|HashTable|
 |1417|[Reformat The String](https://leetcode.com/problems/reformat-the-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1417.java) | |Easy|String|
diff --git a/src/main/java/com/fishercoder/solutions/_1423.java b/src/main/java/com/fishercoder/solutions/_1423.java
@@ -0,0 +1,24 @@
+package com.fishercoder.solutions;
+
+public class _1423 {
+    public static class Solution1 {
+        public int maxScore(int[] cardPoints, int k) {
+            int maxScore = 0;
+            if (cardPoints.length <= k) {
+                for (int point : cardPoints) {
+                    maxScore += point;
+                }
+                return maxScore;
+            }
+            for (int i = 0; i < k; i++) {
+                maxScore += cardPoints[i];
+            }
+            int runningSum = maxScore;
+            for (int i = cardPoints.length - 1, j = 1; i >= 0 && j <= k; i--, j++) {
+                runningSum = runningSum - cardPoints[k - j] + cardPoints[i];
+                maxScore = Math.max(maxScore, runningSum);
+            }
+            return maxScore;
+        }
+    }
+}
diff --git a/src/test/java/com/fishercoder/_1423Test.java b/src/test/java/com/fishercoder/_1423Test.java
@@ -0,0 +1,24 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1423;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class _1423Test {
+    private static _1423.Solution1 solution1;
+    private static int[] cardPoints;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1423.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        cardPoints = new int[]{1, 2, 3, 4, 5, 6, 1};
+        assertEquals(12, solution1.maxScore(cardPoints, 3));
+    }
+
+}
