diff --git a/TangDou/AcWing/RongChi/HDU2204_2.cpp b/TangDou/AcWing/RongChi/HDU2204_2.cpp
index d9ac59b..533cb2c 100644
--- a/TangDou/AcWing/RongChi/HDU2204_2.cpp
+++ b/TangDou/AcWing/RongChi/HDU2204_2.cpp
@@ -1,20 +1,18 @@
 #include <bits/stdc++.h>
 using namespace std;
 #define ll long long
-#define inf 0x3f3f3f3f
-#define ll_inf 1ll << 60
-const int maxn = 100 + 100;
-ll mu[maxn * 100], prim[maxn * 100], check[maxn * 100];
+const int N = 100 + 100;
+ll mu[N * 100], prim[N * 100], check[N * 100];
 int tot = 0;
 void getmu() {
     mu[1] = 1;
-    for (int i = 2; i < maxn; i++) {
+    for (int i = 2; i < N; i++) {
         if (!check[i]) {
             prim[tot++] = i;
             mu[i] = -1;
         }
         for (int j = 0; j < tot; j++) {
-            if (prim[j] > maxn / i) {
+            if (prim[j] > N / i) {
                 break;
             }
             check[i * prim[j]] = 1;