AOC: solve 5th task
This commit is contained in:
parent
4acdaa1deb
commit
ecaf90adb4
|
|
@ -45,103 +45,91 @@ class Solution05(lines: List<String>) {
|
|||
|
||||
// Part 2.
|
||||
fun getLowestLocationNumberForRangeOfSeeds(): Long {
|
||||
var ranges = mutableListOf<RangeWithFirstSeed>()
|
||||
var ranges = mutableListOf<LongRange>()
|
||||
|
||||
for (i in seeds.indices step 2) {
|
||||
ranges.add(
|
||||
RangeWithFirstSeed(
|
||||
LongRange(seeds[i], seeds[i] + seeds[i+1] - 1),
|
||||
seeds[i],
|
||||
)
|
||||
)
|
||||
ranges.add(LongRange(seeds[i], seeds[i] + seeds[i+1] - 1))
|
||||
}
|
||||
|
||||
|
||||
for (map in maps) {
|
||||
val newList = mutableListOf<RangeWithFirstSeed>()
|
||||
var minCheckedValue = Long.MIN_VALUE
|
||||
val newList = mutableListOf<LongRange>()
|
||||
|
||||
for (mapper in map.mappers) {
|
||||
for (rng in ranges) {
|
||||
val maxStart = max(mapper.sourceRangeStart, rng.range.first)
|
||||
val minEndExcl = min(mapper.sourceRangeStart + mapper.rangeLength, rng.range.last + 1)
|
||||
for (mapper in map.mappers.sortedBy{it.sourceRangeStart}) {
|
||||
//
|
||||
val mapperEnd = mapper.sourceRangeStart + mapper.rangeLength - 1
|
||||
val diff = mapper.destRangeStart - mapper.sourceRangeStart
|
||||
|
||||
val len = minEndExcl - maxStart
|
||||
if (len > 0L) {
|
||||
// find all values before this range.
|
||||
val unmatchedValues = ranges
|
||||
.filter{it.first < mapper.sourceRangeStart}
|
||||
.map{LongRange(max(minCheckedValue, it.first), min(mapper.sourceRangeStart - 1, it.last))}
|
||||
.filter{it.first <= it.last}
|
||||
newList.addAll(unmatchedValues)
|
||||
|
||||
val destStart = mapper.destRangeStart + (maxStart - mapper.sourceRangeStart)
|
||||
newList.add(
|
||||
RangeWithFirstSeed(
|
||||
LongRange(destStart, destStart + len - 1),
|
||||
rng.firstSeedInRange
|
||||
)
|
||||
// map values
|
||||
val overlappingLeftValues = ranges
|
||||
.filter{it.first < mapper.sourceRangeStart && it.last >= mapper.sourceRangeStart && it.last <= mapperEnd}
|
||||
.map{
|
||||
LongRange(
|
||||
max(mapper.sourceRangeStart, it.first) + diff,
|
||||
it.last + diff,
|
||||
)
|
||||
}
|
||||
}
|
||||
.filter{it.first <= it.last}
|
||||
newList.addAll(overlappingLeftValues)
|
||||
|
||||
val overlappingMiddleValues = ranges
|
||||
.filter{it.first >= mapper.sourceRangeStart && it.last <= mapperEnd}
|
||||
.map{
|
||||
LongRange(
|
||||
it.first + diff, it.last + diff
|
||||
)
|
||||
}
|
||||
.filter{it.first <= it.last}
|
||||
newList.addAll(overlappingMiddleValues)
|
||||
|
||||
val overlappingRightValues = ranges
|
||||
.filter{it.first >= mapper.sourceRangeStart && it.first <= mapperEnd && it.last >= mapperEnd}
|
||||
.map{
|
||||
LongRange(
|
||||
it.first + diff,
|
||||
min(it.last, mapperEnd) + diff
|
||||
)
|
||||
}
|
||||
.filter{it.first <= it.last}
|
||||
newList.addAll(overlappingRightValues)
|
||||
|
||||
val bigRanges = ranges
|
||||
.filter{it.first < mapper.sourceRangeStart && it.last > mapperEnd}
|
||||
.map{
|
||||
LongRange(
|
||||
mapper.sourceRangeStart + diff, mapperEnd + diff
|
||||
)
|
||||
}
|
||||
.filter{it.first <= it.last}
|
||||
newList.addAll(bigRanges)
|
||||
|
||||
minCheckedValue = mapperEnd + 1
|
||||
}
|
||||
|
||||
// понять, какие диапазоны значений остались неиспользованными,
|
||||
// тоже добавить их в список.
|
||||
|
||||
val mprs = ListOfRanges(map.mappers.map{LongRange(it.sourceRangeStart, it.sourceRangeStart + it.rangeLength - 1)}.toMutableList())
|
||||
|
||||
for (rng in ranges) {
|
||||
var currentRange = rng.range
|
||||
|
||||
var intrs = mprs
|
||||
.findIntersectingRanges(rng.range)
|
||||
.sortedBy{it.first}
|
||||
|
||||
if (intrs.isEmpty()) {
|
||||
newList.add(
|
||||
rng
|
||||
)
|
||||
continue
|
||||
}
|
||||
|
||||
for (i in intrs.indices) {
|
||||
if (intrs[i].start > currentRange.start) {
|
||||
newList.add(
|
||||
RangeWithFirstSeed(
|
||||
LongRange(intrs[i].start, currentRange.start - 1),
|
||||
rng.firstSeedInRange
|
||||
)
|
||||
newList.addAll(
|
||||
ranges
|
||||
.filter{it.last >= minCheckedValue}
|
||||
.map{
|
||||
LongRange(
|
||||
max(it.first, minCheckedValue),
|
||||
it.last,
|
||||
)
|
||||
}
|
||||
|
||||
var end = intrs[i].last
|
||||
|
||||
if (i < intrs.size - 1 && intrs[i].last < intrs[i+1].first - 1) {
|
||||
end = intrs[i+1].first - 1
|
||||
|
||||
newList.add(
|
||||
RangeWithFirstSeed(
|
||||
LongRange(intrs[i].last + 1, intrs[i+1].first - 1),
|
||||
rng.firstSeedInRange,
|
||||
)
|
||||
)
|
||||
}
|
||||
|
||||
currentRange = LongRange(end + 1, currentRange.endInclusive)
|
||||
}
|
||||
|
||||
if (!currentRange.isEmpty()) {
|
||||
newList.add(
|
||||
RangeWithFirstSeed(
|
||||
currentRange,
|
||||
rng.firstSeedInRange
|
||||
)
|
||||
)
|
||||
}
|
||||
}
|
||||
)
|
||||
|
||||
ranges = newList
|
||||
.map{
|
||||
if (it.range.last >= it.range.first) it else RangeWithFirstSeed(LongRange(it.range.last, it.range.first), it.firstSeedInRange)
|
||||
}
|
||||
.toMutableList()
|
||||
}
|
||||
|
||||
return ranges
|
||||
.map{it.range.first}
|
||||
.map{it.first}
|
||||
.min()
|
||||
}
|
||||
}
|
||||
|
|
@ -177,13 +165,3 @@ data class Mapper(val sourceRangeStart: Long, val destRangeStart: Long, val rang
|
|||
return num >= sourceRangeStart && num < sourceRangeStart + rangeLength
|
||||
}
|
||||
}
|
||||
|
||||
data class RangeWithFirstSeed(val range: LongRange, val firstSeedInRange: Long) {
|
||||
}
|
||||
|
||||
data class ListOfRanges(val ranges: MutableList<LongRange>) {
|
||||
fun findIntersectingRanges(other: LongRange): List<LongRange> {
|
||||
return ranges
|
||||
.filter{it.last >= other.first && it.first <= other.last}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -20,13 +20,20 @@ class Solution05Test {
|
|||
fun testGetLowestLocationForRangeOfSeeds() {
|
||||
val text = ResourceReader().readFile("day-05/test.txt")
|
||||
val res = Solution05(text).getLowestLocationNumberForRangeOfSeeds()
|
||||
assertEquals(46L, res)
|
||||
assertEquals(46, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun solvePart2() {
|
||||
val text = ResourceReader().readFile("day-05/input.txt")
|
||||
val res = Solution05(text).getLowestLocationNumberForRangeOfSeeds()
|
||||
println(res)
|
||||
println("Your answer: $res")
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testPart2() {
|
||||
val text = ResourceReader().readFile("day-05/input.txt")
|
||||
val res = Solution05(text).getLowestLocationNumberForRangeOfSeeds()
|
||||
assertEquals(15880236, res)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue