3 ms·

I figured it out like you did as well. I spotted a typo in your explanation though, after the paragraph "Worst case: 15+14 = 29 tests done so far." you need to

I figured it out like you did as well. I spotted a typo in your explanation though, after the paragraph "Worst case: 15+14 = 29 tests done so far." you need to use device 1, but you wrote in the next paragraph "device 2".

rmunn 1y ago
Too late for me to edit my comment, but you're correct; thanks for catching that.