diff --git a/C++/chapLinearList.tex b/C++/chapLinearList.tex
index bbc0ec1c..76d64f01 100644
--- a/C++/chapLinearList.tex
+++ b/C++/chapLinearList.tex
@@ -501,8 +501,8 @@ \subsubsection{代码}
         for (int i = 0; i < nums.size(); i++) {
             const int gap = target - nums[i];
             if (mapping.find(gap) != mapping.end() && mapping[gap] > i) {
-                result.push_back(i + 1);
-                result.push_back(mapping[gap] + 1);
+                result.push_back(i);
+                result.push_back(mapping[gap]);
                 break;
             }
         }
diff --git a/C++/chapTree.tex b/C++/chapTree.tex
index 7e70c7b5..a7fc6cd1 100644
--- a/C++/chapTree.tex
+++ b/C++/chapTree.tex
@@ -1468,7 +1468,7 @@ \subsubsection{代码}
 
 \subsubsection{相关题目}
 \begindot
-\item Validate Binary Search Tree，见 \S \ref{sec:validate-binary-search-tree}
+\item Binary Tree Inorder Traversal，见 \S \ref{sec:binary-tree-inorder-traversal}
 \myenddot
 
 
diff --git a/C++/leetcode-cpp.pdf b/C++/leetcode-cpp.pdf
index 72d3da55..9c7e3155 100644
Binary files a/C++/leetcode-cpp.pdf and b/C++/leetcode-cpp.pdf differ