1. MFCS 2022 (Karlsruhe, Germany):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2022/16506/)
- Solutions (if available): Solutions are not typically provided for conference papers.
2. MFCS 2021 (Prague, Czech Republic):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2021/16411/)
- Solutions (if available): Solutions are not typically provided for conference papers.
3. MFCS 2020 (Virtual Conference due to COVID-19):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2020/16243/)
- Solutions (if available): Solutions are not typically provided for conference papers.
4. MFCS 2019 (Augustow, Poland):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2019/15945/)
- Solutions (if available): Solutions are not typically provided for conference papers.
5. MFCS 2018 (Liverpool, UK):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2018/15647/)
- Solutions (if available): Solutions are not typically provided for conference papers.
6. MFCS 2017 (Praha, Czech Republic):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2017/15282/)
- Solutions (if available): Solutions are not typically provided for conference papers.
7. MFCS 2016 (Krakow, Poland):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2016/15086/)
- Solutions (if available): Solutions are not typically provided for conference papers.
8. MFCS 2015 (Milan, Italy):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2016/14484/)
- Solutions (if available): Solutions are not typically provided for conference papers.
9. MFCS 2014 (Budapest, Hungary):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2014/14084/)
- Solutions (if available): Solutions are not typically provided for conference papers.
10. MFCS 2013 (Brno, Czech Republic):
- Proceedings: [LINK](https://drops.dagstuhl.de/opus/volltexte/2013/13431/)
- Solutions (if available): Solutions are not typically provided for conference papers.
Please note that the difficulty of the questions in these past papers can vary, and the solutions may not be available for all of them. Additionally, the topics covered in these papers may vary from year to year.