201931st International Olympiad in Informatics - First Day Cover
| Miniature Sheet |
| GBP £1.20 |
| First Day Cover |
| GBP £1.50 |
- 10.08.2019
- Nariman Mammadzadeh
- Bobruisk Integrated Printing House, Bobruisk city, Belarus
- Offset
- 28x40 mm
About 31st International Olympiad in Informatics
The International Olympiad in Informatics (IOI) is an annual international informatics competition for high school students from various invited countries, accompanied by social and cultural programmes. It is one of the five international science Olympiads and is one of the most prestigious computer science competitions in the world.
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