diff --git a/OnlineJudges/lydsy/lydsy.cpp b/OnlineJudges/lydsy/lydsy.cpp
index 3b74c4d..31329c5 100644
--- a/OnlineJudges/lydsy/lydsy.cpp
+++ b/OnlineJudges/lydsy/lydsy.cpp
@@ -1,6 +1,25 @@
 #include <bits/stdc++.h>
 using namespace std;
+int a[205];
+int Log(int x)
+{
+    for (int i = 0;; i++)
+        if ((1 << i) > x + 1)
+            return i;
+    return -1;
+}
 int main()
 {
+    int n;
+    double k, c;
+    scanf("%d%lf%lf", &n, &k, &c);
+    for (int i = 0; i < n; i++) scanf("%d", a + i);
+    sort(a, a + n);
+    reverse(a, a + n);
+    int sum = 0;
+    double ans = 0;
+    for (int i = 0; i < n; i++) sum += a[i];
+    for (int i = 0; i < n; i++) ans += a[i] * (Log(i) * k + c);
+    printf("%.3lf", ans / sum);
     return 0;
 }
\ No newline at end of file
diff --git a/退役狗的挣扎/一篇已经弃坑的文档/LICENSE b/退役狗的挣扎/一篇已经弃坑的文档/LICENSE
new file mode 100644
index 0000000..f7e4436
--- /dev/null
+++ b/退役狗的挣扎/一篇已经弃坑的文档/LICENSE
@@ -0,0 +1,15 @@
+2019.08.04 VERSION 0.1
+
+You can use this article freely for learning purpose only.
+
+Following terms should be followed.
+NoDerivatives:
+    Partial copy and any redistribution after modification is not allowed.
+    If you remix, transform, or build upon this article,
+    you may not distribute the modified one.
+NonCommercial:
+    You may not use this article for commercial purposes.
+
+Exclude:
+    Special access right has granted to @Nonad for writing our new document.
+    She is allowed to bypass all the restrictions above.
\ No newline at end of file