Update two-sum.cpp

kamyu104 · kamyu104 · commit fc92d7fc99ba · 2016-04-15T14:19:40.000+08:00
diff --git a/C++/two-sum.cpp b/C++/two-sum.cpp
@@ -4,15 +4,13 @@
 class Solution {
 public:
     vector<int> twoSum(vector<int>& nums, int target) {
-        vector<int> res;
         unordered_map<int, int> lookup;
         for (int i = 0; i < nums.size(); ++i) {
             if (lookup.count(target - nums[i])) {
-                res = {lookup[target - nums[i]], i};
-                break;
+                return {lookup[target - nums[i]], i};
             }
             lookup[nums[i]] = i;
         }
-        return res;
+        return {};
     }
 };

Original file line number	Diff line number	Diff line change
`@@ -4,15 +4,13 @@`
`4`	`4`	`class Solution {`
`5`	`5`	`public:`
`6`	`6`	`vector<int> twoSum(vector<int>& nums, int target) {`
`7`		`- vector<int> res;`
`8`	`7`	`unordered_map<int, int> lookup;`
`9`	`8`	`for (int i = 0; i < nums.size(); ++i) {`
`10`	`9`	`if (lookup.count(target - nums[i])) {`
`11`		`- res = {lookup[target - nums[i]], i};`
`12`		`- break;`
	`10`	`+ return {lookup[target - nums[i]], i};`
`13`	`11`	`}`
`14`	`12`	`lookup[nums[i]] = i;`
`15`	`13`	`}`
`16`		`- return res;`
	`14`	`+ return {};`
`17`	`15`	`}`
`18`	`16`	`};`