add 1523

fishercoder1534 · fishercoder1534 · commit b5156d7b4596 · 2020-07-25T09:19:04.000-07:00
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                   
 |-----|----------------|---------------|--------|-------------|-------------
+|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|
 |1514|[Path with Maximum Probability](https://leetcode.com/problems/path-with-maximum-probability/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1514.java) | |Medium|Graph|
 |1512|[Number of Good Pairs](https://leetcode.com/problems/number-of-good-pairs/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1512.java) | |Easy|Array, HashTable, Math|
diff --git a/src/main/java/com/fishercoder/solutions/_1523.java b/src/main/java/com/fishercoder/solutions/_1523.java
@@ -0,0 +1,12 @@
+package com.fishercoder.solutions;
+
+public class _1523 {
+    public static class Solution1 {
+        public int countOdds(int low, int high) {
+            if (low % 2 != 0 || high % 2 != 0) {
+                return (high - low) / 2 + 1;
+            }
+            return (high - low) / 2;
+        }
+    }
+}
diff --git a/src/test/java/com/fishercoder/_1523Test.java b/src/test/java/com/fishercoder/_1523Test.java
@@ -0,0 +1,22 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1523;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class _1523Test {
+    private static _1523.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1523.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(3, solution1.countOdds(3, 7));
+    }
+
+}
