-
Notifications
You must be signed in to change notification settings - Fork 0
/
aoc-6.1.swift
41 lines (33 loc) · 1.22 KB
/
aoc-6.1.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
var testBanks = [0, 2, 7, 0]
var realInput = [2, 8, 8, 5, 4, 2, 3, 1, 5, 5, 1, 2, 15, 13, 5, 14]
func calculateUniqueRedistributions(banks: [Int]) -> (Int, Int) {
var seenScenarios = [[Int]]()
var currentScenario = banks
var isRepeat: Bool {
return seenScenarios.contains { $0 == currentScenario }
}
var redistributionCount = 0
var loopCount = 0
while !isRepeat || redistributionCount == 0 {
seenScenarios.append(currentScenario)
redistributionCount += 1
let maxBank = currentScenario.max()!
let maxIndex = currentScenario.index(of: maxBank)!
var currentIndex = maxIndex + 1
currentScenario[maxIndex] = 0
for _ in 0..<maxBank {
if currentIndex >= banks.count {
currentIndex = 0
}
currentScenario[currentIndex] += 1
currentIndex += 1
}
if isRepeat {
loopCount = redistributionCount - seenScenarios.index(where: { $0 == currentScenario })!
break
}
}
return (redistributionCount, loopCount)
}
print(calculateUniqueRedistributions(banks: testBanks))
print(calculateUniqueRedistributions(banks: realInput))