add 1512

fishercoder1534 · fishercoder1534 · commit 44fb6026e137 · 2020-07-11T21:32:19.000-07:00
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                   
 |-----|----------------|---------------|--------|-------------|-------------
+|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|
 |1508|[Range Sum of Sorted Subarray Sums](https://leetcode.com/problems/range-sum-of-sorted-subarray-sums/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1508.java) | |Medium|Array, Sort|
 |1507|[Reformat Date](https://leetcode.com/problems/reformat-date/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1507.java) | |Easy|String|
 |1502|[Can Make Arithmetic Progression From Sequence](https://leetcode.com/problems/can-make-arithmetic-progression-from-sequence/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1502.java) | |Easy|Array, Sort|
diff --git a/src/main/java/com/fishercoder/solutions/_1512.java b/src/main/java/com/fishercoder/solutions/_1512.java
@@ -0,0 +1,17 @@
+package com.fishercoder.solutions;
+
+public class _1512 {
+    public static class Solution1 {
+        public int numIdenticalPairs(int[] nums) {
+            int count = 0;
+            for (int i = 0; i < nums.length; i++) {
+                for (int j = i + 1; j < nums.length; j++) {
+                    if (nums[i] == nums[j]) {
+                        count++;
+                    }
+                }
+            }
+            return count;
+        }
+    }
+}
diff --git a/src/test/java/com/fishercoder/_1512Test.java b/src/test/java/com/fishercoder/_1512Test.java
@@ -0,0 +1,22 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1512;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _1512Test {
+    private static _1512.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1512.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(4, solution1.numIdenticalPairs(new int[]{1, 2, 3, 1, 1, 3}));
+    }
+
+}
