fix(ST): delete unused variable

diff --git a/docs/ds/sparse-table.md b/docs/ds/sparse-table.md
index 373ad7c..5436d8b 100644 (file)
--- a/docs/ds/sparse-table.md
+++ b/docs/ds/sparse-table.md
@@ -55,7 +55,7 @@ RMQ 是英文 Range Maximum/Minimum Query 的缩写，表示区间最大（最
 using namespace std;
 const int logn = 21;
 const int maxn = 2000001;
-long long a[maxn], f[maxn][logn], Logn[maxn];
+long long f[maxn][logn], Logn[maxn];
 inline int read() {
   char c = getchar();
   int x = 0, f = 1;