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In problem 143, it says that answers should be 3 values, but the example has only 2 values on the 1st line.
In 144, there is a typo in "since ohterwise there would be no inverse at all"
Thanks a lot! I'll try to fix it now.
Wow, what a nasty text colors. It seems I messed some styles while preparing them for next rank which will appear after 145 solved tasks... :( I'll try to fix it too.