From 81eeb3281f299914b8a0e8c7482cc76f16b1d098 Mon Sep 17 00:00:00 2001
From: ZhuangYumin <zhuangyumin@sjtu.edu.cn>
Date: Tue, 31 Oct 2023 00:04:16 +0800
Subject: [PATCH] fix: memory error

---
 data/CMakeLists.txt |  2 +-
 src/CMakeLists.txt  |  2 +-
 src/int2048.cpp     | 10 +++++-----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index 78cb5b2..52a7d52 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -1,6 +1,6 @@
 set(PROJECT_NAME ${CMAKE_PROJECT_NAME})
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS "-g")
+set(CMAKE_CXX_FLAGS " -g")
 set(ENV{MAKEFLAGS} "-j16")
 include_directories(${PROJECT_SOURCE_DIR}/include)
 link_directories(${PROJECT_SOURCE_DIR}/src)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ef0718e..42a6013 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(PROJECT_NAME ${CMAKE_PROJECT_NAME})
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS "-g")
+set(CMAKE_CXX_FLAGS " -g")
 include_directories(${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 7f7e0dd..bb64e99 100644
--- a/src/int2048.cpp
+++ b/src/int2048.cpp
@@ -176,7 +176,7 @@ inline void UnsignedAdd(int2048 &A, const int2048 *const pB) {
        i++) {
     if (i < (pB->num_length + int2048::kNum - 1) / int2048::kNum)
       A.val[i] += pB->val[i];
-    A.val[i + 1] += A.val[i] / int2048::kMod;
+    if (i + 1 < A.buf_length) A.val[i + 1] += A.val[i] / int2048::kMod;
     A.val[i] %= int2048::kMod;
   }
   A.num_length = std::max(A.num_length, pB->num_length);
@@ -473,19 +473,19 @@ void int2048::RightMoveBy(int L) {
   }
   int big_move = L / int2048::kNum;
   int small_move = L % int2048::kNum;
-  for (int i = 0; i < this->num_length - big_move; i++) {
+  for (int i = 0; i < this->buf_length - big_move; i++) {
     this->val[i] = this->val[i + big_move];
   }
-  for (int i = this->num_length - big_move; i < this->num_length; i++) {
+  for (int i = this->buf_length - big_move; i < this->buf_length; i++) {
     this->val[i] = 0;
   }
   this->num_length -= big_move * int2048::kNum;
   if (small_move == 0) return;
   const static int kPow10[9] = {1,      10,      100,      1000,     10000,
                                 100000, 1000000, 10000000, 100000000};
-  for (int i = 0; i < this->num_length; i++) {
+  for (int i = 0; i < this->buf_length; i++) {
     this->val[i] /= kPow10[small_move];
-    if (i + 1 < this->num_length) {
+    if (i + 1 < this->buf_length) {
       this->val[i] += this->val[i + 1] % kPow10[small_move] *
                       kPow10[int2048::kNum - small_move];
     }