K3v123

translation:Update chapter_stack_and_queue/stack.md

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did some minor changes. If this PR is related to coding or code translation, please fill out the checklist and paste the console outputs to the PR. - [ ]...

translation: Update chapter_graph/index.md

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Just changed the words a little. honestly the Machine translation is good already. If this pull request (PR) pertains to **Chinese-to-English translation**, please confirm that you have read the contribution...

simplified some parts while others added a few words to make it clearer If this pull request (PR) pertains to **Chinese-to-English translation**, please confirm that you have read the contribution...

refined some parts of it. If this pull request (PR) pertains to **Chinese-to-English translation**, please confirm that you have read the contribution guidelines and complete the checklist below: - [x]...

Code missing in EN version

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Seems like theres something wrong with the code.... Other than python, c++, java, the rest of the code in all the chapters on the EN version, is missing. The CN...