update

Author: genkimaru

src/main/java/com/leetcode/hash/HashOne.java

@@ -0,0 +1,33 @@
+package com.leetcode.hash;
+
+/**
+ * two sum
+ * arr = [2 , 7, 9 , 11 ] , target number 9
+ * arr[0] + arr[1] = 9
+ */
+
+public class TwoSum {
+
+    public int[] twoSum(int[] nums, int target) {
+        for(int i = 0 ; i < nums.length - 1 ; i ++){
+            for (int j = i + 1 ; j < nums.length ; j ++){
+                int sum = nums[i] + nums[j];
+                if(sum == target){
+                    return new int[]{i , j};
+                }
+            }
+        }
+        return null;
+    }
+
+    public static void main(String[] args) {
+        int target = 9;
+        int[] arr = {2, 7, 9, 11};
+        int[] ints = new TwoSum().twoSum(arr, target);
+        for(int i : ints){
+            System.out.println(i);
+        }
+    }
+}
+
+