diff --git "a/2209040079 chapter 1/lc chapter1 \344\270\244\346\225\260\344\271\213\345\222\214.cpp" "b/2209040079 chapter 1/lc chapter1 \344\270\244\346\225\260\344\271\213\345\222\214.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..23acd262155a09321febe3d0b58dfe01bf81105d
--- /dev/null
+++ "b/2209040079 chapter 1/lc chapter1 \344\270\244\346\225\260\344\271\213\345\222\214.cpp"	
@@ -0,0 +1,14 @@
+class Solution {
+public:
+   vector<int> twoSum(vector<int>& nums, int target) {
+    unordered_map<int, int> hash;
+    for (int i = 0; i < nums.size(); ++i)
+    {
+        if (hash.find(target - nums[i]) != hash.end())
+            return { hash[target - nums[i]],i };
+        else
+            hash[nums[i]] = i;
+    }
+    return {};
+}
+};
\ No newline at end of file