Day 1: Add part 2
This commit is contained in:
parent
eb2817eec9
commit
56b390dc29
|
@ -40,3 +40,37 @@ To do this, count the number of times a depth measurement increases from the pre
|
||||||
In this example, there are 7 measurements that are larger than the previous measurement.
|
In this example, there are 7 measurements that are larger than the previous measurement.
|
||||||
|
|
||||||
How many measurements are larger than the previous measurement?
|
How many measurements are larger than the previous measurement?
|
||||||
|
|
||||||
|
--- Part Two ---
|
||||||
|
|
||||||
|
Considering every single measurement isn't as useful as you expected: there's just too much noise in the data.
|
||||||
|
|
||||||
|
Instead, consider sums of a three-measurement sliding window. Again considering the above example:
|
||||||
|
|
||||||
|
199 A
|
||||||
|
200 A B
|
||||||
|
208 A B C
|
||||||
|
210 B C D
|
||||||
|
200 E C D
|
||||||
|
207 E F D
|
||||||
|
240 E F G
|
||||||
|
269 F G H
|
||||||
|
260 G H
|
||||||
|
263 H
|
||||||
|
Start by comparing the first and second three-measurement windows. The measurements in the first window are marked A (199, 200, 208); their sum is 199 + 200 + 208 = 607. The second window is marked B (200, 208, 210); its sum is 618. The sum of measurements in the second window is larger than the sum of the first, so this first comparison increased.
|
||||||
|
|
||||||
|
Your goal now is to count the number of times the sum of measurements in this sliding window increases from the previous sum. So, compare A with B, then compare B with C, then C with D, and so on. Stop when there aren't enough measurements left to create a new three-measurement sum.
|
||||||
|
|
||||||
|
In the above example, the sum of each three-measurement window is as follows:
|
||||||
|
|
||||||
|
A: 607 (N/A - no previous sum)
|
||||||
|
B: 618 (increased)
|
||||||
|
C: 618 (no change)
|
||||||
|
D: 617 (decreased)
|
||||||
|
E: 647 (increased)
|
||||||
|
F: 716 (increased)
|
||||||
|
G: 769 (increased)
|
||||||
|
H: 792 (increased)
|
||||||
|
In this example, there are 5 sums that are larger than the previous sum.
|
||||||
|
|
||||||
|
Consider sums of a three-measurement sliding window. How many sums are larger than the previous sum?
|
||||||
|
|
Loading…
Reference in a new issue