From 6f0c66271d9bd878da967a578ca54dc60f899c2f Mon Sep 17 00:00:00 2001
From: Omooo <869759698@qq.com>
Date: Tue, 16 Jun 2020 09:15:12 +0800
Subject: [PATCH] =?UTF-8?q?Update=20=E6=95=B0=E7=BB=84=E7=9B=B8=E5=85=B3.m?=
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---
 blogs/Algorithm/剑指 Offer/数组相关.md | 30 ++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/blogs/Algorithm/剑指 Offer/数组相关.md b/blogs/Algorithm/剑指 Offer/数组相关.md
index 8cbe7dd..48a6279 100644
--- a/blogs/Algorithm/剑指 Offer/数组相关.md	
+++ b/blogs/Algorithm/剑指 Offer/数组相关.md	
@@ -17,6 +17,36 @@ class Solution {
 }
 ```
 
+```java
+class Solution {
+
+    public int findRepeatNumber(int[] nums) {
+        Arrays.sort(nums);
+        for (int i = 0; i < nums.length - 1; i++) {
+            if (nums[i] == nums[i + 1]) {
+                return nums[i];
+            }
+        }
+        return -1;
+    }
+}
+```
+
+```java
+class Solution {
+
+    public int findRepeatNumber(int[] nums) {
+        HashSet<Integer> set = new HashSet<>();
+        for (int i : nums) {
+            if (!set.add(i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+}
+```
+
 [04. 二维数组中的查找](https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof/)
 
 ```java