diff --git a/Luogu/problem/P5082/P5082.cpp b/Luogu/problem/P5082/P5082.cpp
new file mode 100644
index 00000000..5578535f
--- /dev/null
+++ b/Luogu/problem/P5082/P5082.cpp
@@ -0,0 +1,21 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+long long n, a[10000005], b[10000005], c[10000005], a1, b1, c1;
+
+int main() {
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        cin >> a[i];
+        a1 += a[i];
+    }
+    for (int i = 0; i < n; i++) {
+        cin >> b[i];
+        c[i] = a[i] - b[i];
+        b1 += b[i];
+        c1 += c[i];
+    }
+    cout << fixed << setprecision(6) << 1.00 * (a1 * 3 - b1 * 2) / c1 << endl;
+    return 0;
+}