diff --git a/TangDou/Topic/mobius_Prepare.cpp b/TangDou/Topic/mobius_Prepare.cpp
new file mode 100644
index 0000000..129277d
--- /dev/null
+++ b/TangDou/Topic/mobius_Prepare.cpp
@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+    int n = 100;
+    for (int i = 1; i <= n; i++) {
+        printf("F(%d)=", i);
+        bool f = 1;
+        for (int j = 1; j <= n; j++) {
+            if (i % j == 0) { // 如果j是i的因子的话，输出f(j)
+                if (f) {
+                    printf("f(%d)", j);
+                    f = 0;
+                } else
+                    printf("+f(%d)", j);
+            }
+        }
+        printf("\n");
+    }
+    return 0;
+}
\ No newline at end of file