Bug fixes and improvements (#1298)

* Fix is_empty() implementation in the stack and queue chapter

* Update en/CONTRIBUTING.md

* Remove "剩余" from the state definition of knapsack problem

* Sync zh and zh-hant versions

* Update the stylesheets of code tabs

* Fix quick_sort.rb

* Fix TS code

* Update chapter_paperbook

* Upload the manuscript of 0.1 section

* Fix binary_tree_dfs.rb

* Bug fixes

* Update README

* Update README

* Update README

* Update README.md

* Update README

* Sync zh and zh-hant versions

* Bug fixes

zh-hant/codes/c/utils/common.h

@@ -4,8 +4,8 @@
  * Author: MolDuM (moldum@163.com)、Reanon (793584285@qq.com)
  */
 
-#ifndef C_INCLUDE_H
-#define C_INCLUDE_H
+#ifndef COMMON_H
+#define COMMON_H
 
 #include <assert.h>
 #include <stdbool.h>
@@ -33,4 +33,4 @@ extern "C" {
 }
 #endif
 
-#endif // C_INCLUDE_H
+#endif // COMMON_H