更新历史 - 单调栈

feat(ds, graph): add semantic label for paragraph (#4342)

feat(basic/prefix-sum, ds/monotonous-stack): add exercise (#3791)

feat(ds/monotonous-stack): Add figures

apply bot

style: format markdown files with remark-lint

Update monotonous-stack.md

fix: update oj links and other minor fixes

style: format markdown files with remark-lint

fix typo (#569)

fix 题面

fix code

style: format markdown files with remark-lint

Update monotonous-stack.md

style: update style with remark-lint

fix: make links shorter and fix broken links

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