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1 solution
At the end of the 26th day, the frog is 26 × (3-2) = 26 meters from the bottom of the pit.
On the 27th day, he climbs up to 26 + 3 = 29 meters, but falls back to 29 - 2 = 27 meters.
On the 28th day, he climbs up to 27 + 3 = 30 meters, which means that he just climbed out of the pit!
Hence, our answer should be: 2 8