diff --git a/zeta_python/completed/8394.py b/zeta_python/completed/8394.py
new file mode 100644
index 0000000..787b737
--- /dev/null
+++ b/zeta_python/completed/8394.py
@@ -0,0 +1,6 @@
+if __name__ == "__main__":
+    Mem = (1, 0)
+    N = int(input())
+    for i in range(1, N):
+        Mem = ((Mem[1] + Mem[0]) % 10, Mem[0] % 10)
+    print(sum(Mem) % 10)