diff --git a/src/8/11/P11361.cpp b/src/8/11/P11361.cpp
new file mode 100644
index 0000000..294989d
--- /dev/null
+++ b/src/8/11/P11361.cpp
@@ -0,0 +1,3 @@
+int main(){
+    
+}
\ No newline at end of file
diff --git a/src/8/11/two-sum.cpp b/src/8/11/two-sum.cpp
new file mode 100644
index 0000000..3a3ab79
--- /dev/null
+++ b/src/8/11/two-sum.cpp
@@ -0,0 +1,20 @@
+#include <cstdint>
+#include <map>
+#include <set>
+#include <unordered_map>
+#include<vector>
+using namespace std;
+
+class Solution {
+public:
+    vector<int> twoSum(vector<int>& nums, int target) {
+        unordered_map<int, int> m;
+        for(int i=0;i<nums.size();i++){
+            if(auto p = m.find(target-nums[i]);p!=m.end()){
+                return {p->second,i};
+            }
+            m.insert({nums[i],i});
+        }
+        return {0,0};
+    }
+};
\ No newline at end of file