diff --git a/src/bsb/L33.hpp b/src/bsb/L33.hpp
index 368148e..9561d99 100644
--- a/src/bsb/L33.hpp
+++ b/src/bsb/L33.hpp
@@ -13,6 +13,7 @@
 #include <unordered_map>
 #include <utility>
 #include <vector>
+#include <iostream>
 
 namespace GMS {
 
@@ -177,8 +178,7 @@ class L33 {
         //     cerr<<UB.size()<<endl;
         //     for(auto [val, _]: UB)
         //     {
-        //         cerr<<"> "<<get<0>(val)<<' '<<get<1>(val)<<'
-        //         '<<get<2>(val)<<endl;
+        //         cerr<<"> "<<get<0>(val)<<' '<<get<1>(val)<<' '<<get<2>(val)<<endl;
         //     }
         // }
         assert(it_UB != UB.end());
@@ -254,21 +254,35 @@ class L33 {
     pair<VALUE, K_LIST> Pull() {
         BLOCK S0, S1;
 
+        // auto it = D0.begin();
+        // while (S0.size() < M + 1 && it != D0.end()) {
+        //     S0.splice(S0.end(), *it->second);
+        //     blocks.erase(it->second);
+
+        //     it = D0.erase(it);
+        // }
+
+        // it = D1.begin();
+        // while (S1.size() < M + 1 && it != D1.end()) {
+        //     S1.splice(S0.end(), *it->second);
+        //     blocks.erase(it->second);
+
+        //     UB.erase(it->first);
+        //     it = D1.erase(it);
+        // }
+
         auto it = D0.begin();
         while (S0.size() < M + 1 && it != D0.end()) {
-            S0.splice(S0.end(), *it->second);
-            blocks.erase(it->second);
-
-            it = D0.erase(it);
+            auto& block = *it->second;
+            for (auto& kv : block) S0.insert(S0.end(), kv);
+            it++;
         }
 
         it = D1.begin();
         while (S1.size() < M + 1 && it != D1.end()) {
-            S1.splice(S0.end(), *it->second);
-            blocks.erase(it->second);
-
-            UB.erase(it->first);
-            it = D1.erase(it);
+            auto& block = *it->second;
+            for (auto& kv : block) S1.insert(S1.end(), kv);
+            it++;
         }
 
         KV_LIST S;
@@ -277,15 +291,9 @@ class L33 {
         for (auto& item : S0) S.emplace_back(std::move(item));
         for (auto& item : S1) S.emplace_back(std::move(item));
 
-        for (auto [a, b] : S) ptr.erase(a);
-
-        if (D1.empty()) {
-            auto it_BLIST = blocks.emplace(blocks.end());
-            auto it_ILIST = D1.emplace(D1.end(), B, it_BLIST);
-            UB[B] = it_ILIST;
-        }
-
         if (S.size() <= M) {
+            for (auto [a, b] : S) Delete(a);
+
             K_LIST s;
             s.reserve(S.size());
             for (auto [a, b] : S) s.push_back(a);
@@ -303,11 +311,14 @@ class L33 {
         // for (auto [a, b] : S) cerr<<get<0>(b)<<' '<<get<1>(b)<<'
         // '<<get<2>(b)<<endl;
 
-        KV_LIST R(make_move_iterator(nth + 1), make_move_iterator(S.end()));
-        S.resize(M);
+        nth = S.begin(), advance(nth, M);
+        VALUE x = nth->second;
 
-        VALUE x = R.front().second;
-        for (auto [a, b] : R) x = min(x, b);
+        while (nth != S.end()) {
+            x = min(x, nth->second);
+            nth++;
+        }
+        S.resize(M);
 
         // cerr<<"DEBUG M!! : "<<M<<endl;
         // cerr<<"DEBUG R!!"<<endl;
@@ -320,7 +331,8 @@ class L33 {
 
         // cerr<<endl;
 
-        BatchPrepend(R);
+        // BatchPrepend(R);
+        for (auto [a, b] : S) Delete(a);
 
         K_LIST s;
         s.reserve(S.size());
@@ -330,23 +342,22 @@ class L33 {
     }
     bool empty() const { return ptr.empty(); }
 
-    void _debug(ostream& os)
-    {
-        os<<"D0: "<<endl;
-        for(auto [B, it_BLIST]:D0)
-        {
-            os<<"["<<B<<"] : ";
-            auto &block = *it_BLIST;
-            for(auto [key, val] : block) os << "(" << key << " : " << val << ") ";
-            os<<endl;
+    void _debug(ostream& os) {
+        os << "D0: " << endl;
+        for (auto [B, it_BLIST] : D0) {
+            os << "[" << B << "] : ";
+            auto& block = *it_BLIST;
+            for (auto [key, val] : block)
+                os << "(" << key << " : " << val << ") ";
+            os << endl;
         }
-        os<<"D1: "<<endl;
-        for(auto [B, it_BLIST]:D1)
-        {
-            os<<"["<<B<<"] : ";
-            auto &block = *it_BLIST;
-            for(auto [key, val] : block) os << "(" << key << " : " << val << ") ";
-            os<<endl;
+        os << "D1: " << endl;
+        for (auto [B, it_BLIST] : D1) {
+            os << "[" << B << "] : ";
+            auto& block = *it_BLIST;
+            for (auto [key, val] : block)
+                os << "(" << key << " : " << val << ") ";
+            os << endl;
         }
     }
 };
diff --git a/src/test/L33-test1.cpp b/src/test/L33-test1.cpp
index 2f77c3c..4f0a309 100644
--- a/src/test/L33-test1.cpp
+++ b/src/test/L33-test1.cpp
@@ -4,6 +4,8 @@
 // #include <limits>
 #include <random>
 
+using uint = unsigned int;
+
 TEST(L33_test, debug_small) {
     const unsigned seed = 998244353;
     const uint N = 10, M = 1, MX = 1e9;
@@ -11,52 +13,50 @@ TEST(L33_test, debug_small) {
     std::mt19937 gen(seed);
     std::uniform_int_distribution<int> dis(1, MX);
 
-    GMS::L33<int,int> D(M, MX);
-    std::map<int,int> mp;
+    GMS::L33<int, int> D(M, MX);
+    std::map<int, int> mp;
 
     std::vector<int> keys;
-    for(int i=1;i<=N;i++) keys.push_back(i);
+    for (uint i = 1; i <= N; i++) keys.push_back(i);
 
     std::shuffle(keys.begin(), keys.end(), gen);
 
-    for(auto key:keys)
-    {
+    for (auto key : keys) {
         int val = dis(gen);
-        std::cerr<<key<<": "<<val<<std::endl;
+        // std::cerr<<key<<": "<<val<<std::endl;
 
         mp[val] = key;
-        
+
         D.Insert(key, val);
     }
 
-    std::cerr<<"[!] mp: "<<std::endl;
-    for(auto [val, key] : mp)
-        std::cerr<<key<<": "<<val<<std::endl;
+    // std::cerr<<"[!] mp: "<<std::endl;
+    // for(auto [val, key] : mp)
+    //     std::cerr<<key<<": "<<val<<std::endl;
 
-    D._debug(std::cerr);
-    
-    std::cerr<<"[!] D: "<<std::endl;
+    // D._debug(std::cerr);
+
+    // std::cerr<<"[!] D: "<<std::endl;
     int bef = 0;
-    while(!D.empty())
-    {
+    while (!D.empty()) {
         auto [B, keys] = D.Pull();
 
-        std::cerr<<"[!] new pull; B : "<<B<<" ("<<keys.size()<<')'<<": ";
-        for(auto i:keys) std::cerr<<i<<' ';
-        std::cerr<<std::endl;
+        // std::cerr<<"[!] new pull; B : "<<B<<" ("<<keys.size()<<')'<<": ";
+        // for(auto i:keys) std::cerr<<i<<' ';
+        // std::cerr<<std::endl;
+
+        // D._debug(std::cerr);
 
-        D._debug(std::cerr);
-        
         EXPECT_LT(bef, B);
         bef = B;
-        std::cerr<<std::endl;
+        // std::cerr<<std::endl;
     }
 }
 
-TEST(L33_test, DISABLED_emptying_test1) {
-    const double inf = 100;
+TEST(L33_test, emptying_test1) {
+    const double inf = 1000;
     const unsigned seed = 998244353;
-    const uint N = 2328, M = 10, MX = 1e9;
+    const uint N = 232800, M = 170, MX = 1e9;
 
     std::mt19937 gen(seed);
     std::uniform_int_distribution<int> dis(1, MX);
@@ -65,20 +65,22 @@ TEST(L33_test, DISABLED_emptying_test1) {
     GMS::L33<int, double> D(M, inf);
 
     std::vector<int> vec;
-    for (int i = 1; i <= N; i++) vec.push_back(i);
+    for (uint i = 1; i <= N; i++) vec.push_back(i);
 
     std::shuffle(vec.begin(), vec.end(), gen);
 
-    for (int i = 0; i < N; i++) {
+    for (uint i = 0; i < N; i++) {
         D.Insert(vec[i], valdis(gen));
     }
 
-    int cnt = 0; double bef = -inf;
+    int cnt = 0;
+    double bef = -inf;
 
-    while(!D.empty())
-    {
+    while (!D.empty()) {
         auto [B, v] = D.Pull();
         // std::cerr<<B<<' '<<v.size()<<std::endl;
+        // for(auto i:v) std::cerr<<i<<' ';
+        // std::cerr<<std::endl;
         cnt += v.size();
 
         EXPECT_TRUE(D.empty() || (v.size() == M));
@@ -91,3 +93,89 @@ TEST(L33_test, DISABLED_emptying_test1) {
     int result = 2 + 2;
     EXPECT_EQ(result, 4);
 }
+
+TEST(L33_test, emptying_test2) {
+    const double inf = 1000;
+    const unsigned seed = 993244853;
+    const uint N = 2320000, M = 1700000;
+
+    std::mt19937 gen(seed);
+    std::uniform_real_distribution<double> valdis(-inf, inf);
+
+    GMS::L33<int, double> D(M, inf);
+
+    std::vector<int> vec;
+    for (uint i = 1; i <= N; i++) vec.push_back(i);
+
+    std::shuffle(vec.begin(), vec.end(), gen);
+
+    std::vector<std::pair<int, double> > v;
+    for (uint i = 0; i < N; i++) {
+        v.push_back({vec[i], valdis(gen)});
+    }
+
+    D.BatchPrepend(v);
+    // D._debug(std::cerr);
+
+    int cnt = 0;
+    double bef = -inf;
+
+    while (!D.empty()) {
+        auto [B, v] = D.Pull();
+        cnt += v.size();
+
+        EXPECT_TRUE(D.empty() || (v.size() == M));
+        EXPECT_LE(bef, B);
+        bef = B;
+    }
+
+    EXPECT_EQ(cnt, N);
+
+    int result = 2 + 2;
+    EXPECT_EQ(result, 4);
+}
+
+TEST(L33_test, emptying_test3) {
+    const double inf = 10099990;
+    const unsigned seed = 999244153;
+    const uint N = 2320080, M = 180000;
+
+    std::mt19937 gen(seed);
+    std::uniform_real_distribution<double> valdis(-inf, inf);
+
+    GMS::L33<int, double> D(M, inf*2);
+
+    std::vector<int> vec;
+    for (uint i = 1; i <= N; i++) vec.push_back(i);
+
+    std::shuffle(vec.begin(), vec.end(), gen);
+
+    std::vector<std::pair<int, double> > v;
+    std::set<int> keys;
+    for (uint i = 0; i < N; i++) {
+        D.Insert(vec[i], valdis(gen) + inf);
+        keys.insert(vec[i]);
+
+        v.push_back({vec[i]+N/2, valdis(gen)});
+        keys.insert(vec[i]+N/2);
+    }
+
+    D.BatchPrepend(v);
+
+    int cnt = 0;
+    double bef = -inf;
+
+    while (!D.empty()) {
+        auto [B, v] = D.Pull();
+        cnt += v.size();
+
+        EXPECT_TRUE(D.empty() || (v.size() == M));
+        EXPECT_LE(bef, B);
+        bef = B;
+    }
+
+    EXPECT_EQ(cnt, keys.size());
+
+    int result = 2 + 2;
+    EXPECT_EQ(result, 4);
+}