diff --git a/README.md b/README.md
index fe7dae5..d67f27c 100644
--- a/README.md
+++ b/README.md
@@ -13,4 +13,9 @@
 ### 
 1. 编辑距离 i-1,j i,j-1
 2. 合并石子 1~k,k+1~i
-3. 网捉蛇 1~k用j-1, k+1~i用1
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+3. 网捉蛇 1~k用j-1, k+1~i用1
+
+## 超时优化的三种方法
+1. 预处理(排序最常用)
+2. 二分
+3. 数学方法
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diff --git a/src/test.cpp b/src/test.cpp
index 018647b..294989d 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -1,19 +1,3 @@
-#include <cmath>
-#include <iostream>
-#include <set>
-#include <stdexcept>
-#include <string>
 int main(){
-    int n;
-    std::cin>>n;
-    std::set<int> s;
-    std::cout<<n<<"\n";
-    for(int i=1;i<=n;i++){
-        int tmp;
-        std::cin>>tmp;
-        if(s.find(tmp)==s.end()){
-            throw std::runtime_error(std::to_string(tmp));
-        }
-        s.insert(tmp);
-    }
+    
 }
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