diff --git a/Map STL.cpp b/Map STL.cpp
new file mode 100644
index 0000000..c8a887a
--- /dev/null
+++ b/Map STL.cpp	
@@ -0,0 +1,52 @@
+#include <cmath>
+#include <cstdio>
+#include <vector>
+#include <iostream>
+#include <set>
+#include <map>
+#include <algorithm>
+using namespace std;
+int main() {   
+     map<string,int>s;
+    int q;
+    cin>>q;
+        for(int i=0;i<q;i++)
+        {
+           int t,n,m;
+            cin>>t;
+            switch(t)
+                {
+                case 1:
+                {
+                    string name;
+                    int marks;
+                    cin>>name>>marks;
+                    map<string,int>::iterator itr=s.find(name);
+                    if(itr==s.end())
+                    s.insert(make_pair(name,marks));
+                    else
+                    itr->second+=marks;
+                    break;
+                }
+                case 2:
+                {
+                    string name;
+                    cin>>name;
+                    s.erase(name);
+                    break;
+                }
+                case 3:
+                {
+                    string name;
+                    cin>>name;
+                    map<string,int>::iterator itr=s.find(name);
+                    if(itr==s.end())
+                        cout<<"0"<<endl;
+                    else
+                        cout<<itr->second<<endl;
+                    break;
+                }
+            }
+        }
+    return 0;
+}