diff --git a/day10/U88589/U88589.cpp b/day10/U88589/U88589.cpp
index dc742ab..f92893a 100644
--- a/day10/U88589/U88589.cpp
+++ b/day10/U88589/U88589.cpp
@@ -1,112 +1,55 @@
-/*
-[set容器]
-- `1 x`: 插入一个值为 $x$ 的数；
-
-- `2 x`: 删除一个值为 $x$ 的数，保证存在，若有多个只删除 $1$ 个；
-
-- `3 l r`: 询问所有满足 $l\le x\le r$ 的 $x$ 的和；[排序]
-
-- `4 x`: 询问集合中 <= x 的最大数，若没有输出 `-1`；
-
-- `5 x`: 询问集合中 >= x 的最小数，若没有输出 `-1`；
-
-1 2 
-
-*/
-
+//暴力 80point 逆天了，样例太水了
 #include<bits/stdc++.h>
 using namespace std;
-#define int long long
 
-const int MAX_X=1e5+5;
-int q;
-vector<int>v(MAX_X);
-set<int> s;
-int getint();
+const int MAX_N = 5e8+5;
+int a[MAX_N];
 
-signed main(signed argc,char *argv[]){
-    #ifdef OITEST
-        cout<<"TESTING"<<endl;
-        #define AS(c){if(!(c)){cerr<<"assert failed:"<<#c<<endl;return -1;}}
-        #define ASM(a,b){if((a)!=(b)){cerr<<"assert failed: "<<a<<endl<<b<<endl;return 1;}}
-        AS(argc==3)
-        auto fin = freopen(argv[1],"r",stdin);
-        AS(fin!=NULL)
-        ifstream afile(argv[2]);
-        stringstream ss;
-        #define cout ss
-        int ans_num = 0;
-    #endif
-    q=getint();
-    for(int i=1;i<=q;i++){
-        const int n=getint();
-        #ifdef OITEST
-            if(n>=3){
-                ans_num++;
-            }
-        #endif
-        if(n==1){
-            const int x=getint();
-            /*auto state = */s.insert(x);
-            if(x>=v.size())v.resize(x+1);
-            v[x]++;
-        }else if (n==2) {
-            const int x=getint();
-            v[x]--;
-            if(v[x]==0){s.erase(x);}
-        }else if(n==3){
-            const int l=getint(),r=getint();
-            const auto sl=s.lower_bound(l)
-                        ,sr=s.lower_bound(r);
+int readint();
+
+int main(){
+    // auto a  = new int[MAX_N];
+    const int n = readint();
+    for(int i=1;i<=n;i++){
+        const int m = readint();
+        if(m==1){
+            const int x=readint();
+            a[x]++;
+        }else if(m==2){
+            const int x=readint();
+            a[x]--;
+        }else if(m==3){
+            const int l=readint(),r=readint();
             int ans=0;
-            for(auto i=sl;i!=sr;i++){
-                ans+=(*i)*v[(*i)];
-            }
-            if ((*sr)==r) {
-                ans+=(*sr)*v[(*sr)];
+            for(int j=l;j<=r;j++){
+                ans+=j*a[j];
             }
             cout<<ans<<endl;
-        }else if(n==4){
-            const int x=getint();
-            // if(x==99){
-            //     cerr<<"debugging"<<endl;
-            // }
-            auto it=s.lower_bound(x);
-            if((*it)==x){
-                cout<<x<<endl;
-                continue;
-            }else{
-                it--;
-                if((*it)<x){
-                    cout<<(*it)<<endl;
-                    continue;
-                }else{
-                    cout<<-1<<endl;
-                    continue;
+        }else if(m==4){
+            const int x = readint();
+            for(int j=x;j>=0;j--){
+                if(a[j]){
+                    cout<<j<<endl;
+                    goto out1;
                 }
             }
-            cout<<(*it)<<endl;
-        }else if(n==5){
-            const int x=getint();
-            auto it=s.lower_bound(x);
-            if(it==s.end()){
-                cout<<-1<<endl;
-                continue;
+            cout<<-1<<endl;
+            out1:;
+        }else if(m==5){
+            const int x = readint();
+            for(int j=x;j<MAX_N;j++){
+                if(a[j]){
+                    cout<<j<<endl;
+                    goto out;
+                }
             }
-            cout<<(*it)<<endl;
+            cout<<-1<<endl;
+            out:;
         }
     }
-    #ifdef OITEST
-        for(int i=1;i<=ans_num;i++){
-            int cans ,myans;
-            afile>>cans;
-            ss>>myans;
-            ASM(cans,myans)
-        }
-    #endif
 }
 
-int getint(){
+int readint(){
     int x=0,w=1;
     char ch=0;
     while(!isdigit(ch)){