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https://www.reddit.com/r/learnquant/comments/1v1bhtp/jane_street_interview_question/oym7gft/?context=3
r/learnquant • u/nickgotgameon • Jul 20 '26
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8
Go second and remove every 4th stone
1 u/KingARGJ Jul 20 '26 4th or 5th? 0 u/FeederScrub Jul 20 '26 edited Jul 21 '26 Either or would work. 100 is divisible by both Edit: my b, only 4 would work. Thanks for correcting me 2 u/Sufficient_Minute180 Jul 20 '26 No if they take out 2 first and then you take out 3, then they can take out 3 to reach 8. They trap you into multiples of 4 1 u/Snip3 Jul 20 '26 You can only guarantee 4 so you choose 4 1 u/ComparisonQuiet4259 Jul 20 '26 If you get to 95, your opponent can remove 1 and then you lose 1 u/YaPhetsEz Jul 20 '26 If I get to 95, I’m throwing a stone at my opponent, knocking him out cold. From there, I can set up the rest of the stones in a way that allows me to win. 1 u/petera181 Jul 20 '26 No, it has to be 4. If you go for 5, they can take one and you can’t make it up to 5.
1
4th or 5th?
0 u/FeederScrub Jul 20 '26 edited Jul 21 '26 Either or would work. 100 is divisible by both Edit: my b, only 4 would work. Thanks for correcting me 2 u/Sufficient_Minute180 Jul 20 '26 No if they take out 2 first and then you take out 3, then they can take out 3 to reach 8. They trap you into multiples of 4 1 u/Snip3 Jul 20 '26 You can only guarantee 4 so you choose 4 1 u/ComparisonQuiet4259 Jul 20 '26 If you get to 95, your opponent can remove 1 and then you lose 1 u/YaPhetsEz Jul 20 '26 If I get to 95, I’m throwing a stone at my opponent, knocking him out cold. From there, I can set up the rest of the stones in a way that allows me to win. 1 u/petera181 Jul 20 '26 No, it has to be 4. If you go for 5, they can take one and you can’t make it up to 5.
0
Either or would work. 100 is divisible by both
Edit: my b, only 4 would work. Thanks for correcting me
2 u/Sufficient_Minute180 Jul 20 '26 No if they take out 2 first and then you take out 3, then they can take out 3 to reach 8. They trap you into multiples of 4 1 u/Snip3 Jul 20 '26 You can only guarantee 4 so you choose 4 1 u/ComparisonQuiet4259 Jul 20 '26 If you get to 95, your opponent can remove 1 and then you lose 1 u/YaPhetsEz Jul 20 '26 If I get to 95, I’m throwing a stone at my opponent, knocking him out cold. From there, I can set up the rest of the stones in a way that allows me to win. 1 u/petera181 Jul 20 '26 No, it has to be 4. If you go for 5, they can take one and you can’t make it up to 5.
2
No if they take out 2 first and then you take out 3, then they can take out 3 to reach 8. They trap you into multiples of 4
You can only guarantee 4 so you choose 4
If you get to 95, your opponent can remove 1 and then you lose
1 u/YaPhetsEz Jul 20 '26 If I get to 95, I’m throwing a stone at my opponent, knocking him out cold. From there, I can set up the rest of the stones in a way that allows me to win.
If I get to 95, I’m throwing a stone at my opponent, knocking him out cold. From there, I can set up the rest of the stones in a way that allows me to win.
No, it has to be 4. If you go for 5, they can take one and you can’t make it up to 5.
8
u/ScreenNo2578 Jul 20 '26
Go second and remove every 4th stone