add 1525

fishercoder1534 · fishercoder1534 · commit 74d4cab3443a · 2020-07-25T10:14:37.000-07:00
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                   
 |-----|----------------|---------------|--------|-------------|-------------
+|1525|[Number of Good Ways to Split a String](https://leetcode.com/problems/number-of-good-ways-to-split-a-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1525.java) | |Medium|String, Bit Manipulation|
 |1524|[Number of Sub-arrays With Odd Sum](https://leetcode.com/problems/number-of-sub-arrays-with-odd-sum/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1524.java) | |Medium|Array, Math|
 |1523|[Count Odd Numbers in an Interval Range](https://leetcode.com/problems/count-odd-numbers-in-an-interval-range/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1523.java) | |Easy|Math|
 |1518|[Water Bottles](https://leetcode.com/problems/water-bottles/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1518.java) | |Easy|Greedy|
diff --git a/src/main/java/com/fishercoder/solutions/_1525.java b/src/main/java/com/fishercoder/solutions/_1525.java
@@ -0,0 +1,36 @@
+package com.fishercoder.solutions;
+
+public class _1525 {
+    public static class Solution1 {
+        public int numSplits(String s) {
+            int goodSplits = 0;
+            int[] left = new int[26];
+            int[] right = new int[26];
+            for (int i = 0; i < s.length(); i++) {
+                char c = s.charAt(i);
+                right[c - 'a']++;
+            }
+            for (int i = 0; i < s.length(); i++) {
+                char c = s.charAt(i);
+                left[c - 'a']++;
+                int distinctCharOnTheLeft = getDistinct(left);
+                right[c - 'a']--;
+                int distinctCharOnTheRight = getDistinct(right);
+                if (distinctCharOnTheLeft == distinctCharOnTheRight) {
+                    goodSplits++;
+                }
+            }
+            return goodSplits;
+        }
+
+        private int getDistinct(int[] count) {
+            int c = 0;
+            for (int i : count) {
+                if (i != 0) {
+                    c++;
+                }
+            }
+            return c;
+        }
+    }
+}
diff --git a/src/test/java/com/fishercoder/_1525Test.java b/src/test/java/com/fishercoder/_1525Test.java
@@ -0,0 +1,32 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1525;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class _1525Test {
+    private static _1525.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1525.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(2, solution1.numSplits("aacaba"));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(1, solution1.numSplits("abcd"));
+    }
+
+    @Test
+    public void test3() {
+        assertEquals(4, solution1.numSplits("aaaaa"));
+    }
+
+}
