8000 17/18 Sem 1 Q15(a) · Issue #379 · nus-cs2030/2021-s2 · GitHub
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17/18 Sem 1 Q15(a) #379

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lyntan01 opened this issue Apr 26, 2021 · 4 comments
Open

17/18 Sem 1 Q15(a) #379

lyntan01 opened this issue Apr 26, 2021 · 4 comments
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🧠 Finals Q&A Questions related to Finals

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@lyntan01
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Summary

Hi, why isn't the answer 4 instead of 26? I understood it as the question asking for the value of x, not the value of the entire statement. (Although technically x is a local variable so x has no value outside the stream)

Screenshot and Suggested Answer:

photo_2021-04-27 03 07 50
@lyntan01 lyntan01 added the 🧠 Finals Q&A Questions related to Finals label Apr 26, 2021
@Buwoo
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Buwoo commented Apr 27, 2021

1 passes into reduce: 0 x 2 + 1 = 1
new seed value: 1
2 passes into reduce: 1 x 2 + 2 = 4
new seed value: 4
3 passes into reduce: 4 x 2 + 3 = 11
new seed value: 11
4 passes into reduce: 11 x 2 + 4 = 26 (ans)

@darrylcjy
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I have the same thought as you. Felt like this question was not phrased that well.

@e0543492
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You are right. The question could have been phrased better.

@lyntan01
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lyntan01 commented Apr 27, 2021 •
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thanks guys! glad to know i wasn't the only one confused

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