diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index 52a7d52..0432e9a 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -1,6 +1,6 @@
 set(PROJECT_NAME ${CMAKE_PROJECT_NAME})
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS " -g")
+set(CMAKE_CXX_FLAGS "-fsanitize=address -g")
 set(ENV{MAKEFLAGS} "-j16")
 include_directories(${PROJECT_SOURCE_DIR}/include)
 link_directories(${PROJECT_SOURCE_DIR}/src)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 42a6013..7267cb9 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(PROJECT_NAME ${CMAKE_PROJECT_NAME})
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS " -g")
+set(CMAKE_CXX_FLAGS "-fsanitize=address -g")
 include_directories(${PROJECT_SOURCE_DIR}/include)
 add_library(int2048 STATIC int2048.cpp)
\ No newline at end of file
diff --git a/src/int2048.cpp b/src/int2048.cpp
index f6f21ab..13bd3f0 100644
--- a/src/int2048.cpp
+++ b/src/int2048.cpp
@@ -221,6 +221,7 @@ int2048 &int2048::add(const int2048 &B) {
       this->flag = 1;
     }
   }
+  if (pB != &B) delete pB;
   return *this;
 }
 
@@ -272,6 +273,7 @@ int2048 &int2048::minus(const int2048 &B) {
     if (this == &B) pB = new int2048(B);
     UnsignedAdd(*this, pB);
   }
+  if (pB != &B) delete pB;
   return *this;
 }
 
@@ -442,10 +444,12 @@ int2048 &int2048::Multiply(const int2048 &B) {
   if ((this->num_length == 1 && this->val[0] == 0) ||
       (pB->num_length == 1 && pB->val[0] == 0)) {
     *this = std::move(int2048(0));
+    if (pB != &B) delete pB;
     return *this;
   }
   this->flag = this->flag * pB->flag;
   UnsignedMultiply(*this, pB);
+  if (pB != &B) delete pB;
   return *this;
 }
 
@@ -495,6 +499,7 @@ void int2048::RightMoveBy(int L) {
 
 inline void UnsignedDivide(int2048 &A, const int2048 *pB) {
   int L1 = A.num_length, L2 = pB->num_length;
+  if (&A == pB) throw "UnsignedDivide: A and B are the same object";
   if (2 * L1 - L2 - 1 < 0) {
     A = std::move(int2048(0));
     return;
@@ -597,15 +602,15 @@ int2048 operator/(int2048 A, const int2048 &B) {
 
 int2048 &int2048::operator%=(const int2048 &B) {
   // 实现复合取模逻辑
-  int2048 C=(*this)/B;
-  *this=*this-C*B;
+  int2048 C = (*this) / B;
+  *this = *this - C * B;
   return *this;
 }
 
 int2048 operator%(int2048 A, const int2048 &B) {
   // 实现取模逻辑
-  int2048 C=A/B;
-  return A-C*B;
+  int2048 C = A / B;
+  return A - C * B;
 }
 
 std::istream &operator>>(std::istream &stream, int2048 &V) {
diff --git a/tester/config.json b/tester/config.json
index 1f6e036..bd0ab34 100644
--- a/tester/config.json
+++ b/tester/config.json
@@ -1,5 +1,5 @@
 {
-  "StatusInterpreter":{"0":"OK","1":"Wrong Answer","139":"Segmentation fault"},
+  "StatusInterpreter":{"0":"OK","1":"Wrong Answer","139":"Segmentation fault","137":"(Killed) maybe Time Limit Error"},
   "Cases":
   [
     {"command":"timeout -s 9 10s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C1T1 >/tmp/C1T1.out && diff -b -B -u /tmp/C1T1.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer1/1.out >/tmp/diffC1T1","uid":"#1","tid":"/1/1"},
@@ -24,7 +24,7 @@
     {"command":"timeout -s 9 10s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C2T15 >/tmp/C2T15.out && diff -b -B -u /tmp/C2T15.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer2/15.out >/tmp/diffC2T15","uid":"#25","tid":"/2/15"},
     {"command":"timeout -s 9 10s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C2T16 >/tmp/C2T16.out && diff -b -B -u /tmp/C2T16.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer2/16.out >/tmp/diffC2T16","uid":"#26","tid":"/2/16"},
     {"command":"timeout -s 9 10s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C2T17 >/tmp/C2T17.out && diff -b -B -u /tmp/C2T17.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer2/17.out >/tmp/diffC2T17","uid":"#27","tid":"/2/17"},
-    {"command":"timeout -s 9 10s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C2T18 >/tmp/C2T18.out && diff -b -B -u /tmp/C2T18.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer2/18.out >/tmp/diffC2T18","uid":"#28","tid":"/2/18"},
+    {"command":"timeout -s 9 60s /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/build/data/C2T18 >/tmp/C2T18.out && diff -b -B -u /tmp/C2T18.out /home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/data/Integer2/18.out >/tmp/diffC2T18","uid":"#28","tid":"/2/18"},
     {"command":"/home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/tester/cases/1.py","uid":"#29","tid":"/3/1"},
     {"command":"/home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/tester/cases/2.py","uid":"#30","tid":"/3/2"},
     {"command":"/home/happyzym/CSWorkSpace/Proc/BigHomework/BH-int2048-2023/tester/cases/3.py","uid":"#31","tid":"/3/3"}