diff --git a/TangDou/Topic/【前缀和与差分】题单.md b/TangDou/Topic/【前缀和与差分】题单.md
index 76f2fa2..13e002d 100644
--- a/TangDou/Topic/【前缀和与差分】题单.md
+++ b/TangDou/Topic/【前缀和与差分】题单.md
@@ -26,7 +26,7 @@
 ```cpp {.line-numbers}
 #include <bits/stdc++.h>
 using namespace std;
-const int N = 1e6 + 10;
+const int N = 200100;
 const int INF = 0x3f3f3f3f;
 int n, a[N], s[N], ans[N];