'commit'

TangDou/LuoGuBook/P5266.cpp

@@ -0,0 +1,36 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int n;
+string name;
+int opt, score;
+
+unordered_map<string, int> _map;
+
+int main() {
+    cin >> n;
+    while (n--) {
+        cin >> opt;
+        switch (opt) {
+            case 1:
+                cin >> name >> score;
+                _map[name] = score;
+                cout << "OK" << endl;
+                break;
+            case 2:
+                cin >> name;
+                if (_map.count(name) > 0) cout << _map[name] << endl;
+                else cout << "Not found" << endl;
+                break;
+            case 3:
+                cin >> name;
+                if (_map.count(name) > 0) _map.erase(name), cout << "Deleted successfully" << endl;
+                else cout << "Not found" << endl;
+                break;
+            case 4:
+                cout << _map.size() << endl;
+                break;
+        }
+    }
+    return 0;
+}