add 1422

Author: fishercoder1534

README.md

@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ ★
 
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
+|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|
 |1415|[The k-th Lexicographical String of All Happy Strings of Length n](https://leetcode.com/problems/the-k-th-lexicographical-string-of-all-happy-strings-of-length-n/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1415.java) | |Medium|Backtracking|

src/main/java/com/fishercoder/solutions/_1422.java

@@ -0,0 +1,25 @@
+package com.fishercoder.solutions;
+
+public class _1422 {
+    public static class Solution1 {
+        public int maxScore(String s) {
+            int zeroes = s.charAt(0) == '0' ? 1 : 0;
+            int ones = 0;
+            for (int i = 1; i < s.length(); i++) {
+                if (s.charAt(i) == '1') {
+                    ones++;
+                }
+            }
+            int maxScore = zeroes + ones;
+            for (int i = 1; i < s.length() - 1; i++) {
+                if (s.charAt(i) == '0') {
+                    zeroes++;
+                } else {
+                    ones--;
+                }
+                maxScore = Math.max(maxScore, zeroes + ones);
+            }
+            return maxScore;
+        }
+    }
+}

src/test/java/com/fishercoder/_1422Test.java

@@ -0,0 +1,27 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1422;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class _1422Test {
+    private static _1422.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1422.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(5, solution1.maxScore("011101"));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(5, solution1.maxScore("00111"));
+    }
+
+}