'commit'

TangDou/LanQiaoBei/LanQiao12XuanBaSai/2.cpp

@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int n;
+    cin >> n;
+    if (n <= 20) printf("%d", n * 10);
+    else
+        printf("%d", 20 * 10 + (n - 20) * 15);
+    return 0;
+}