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fxn/aoc_2022_04_part1.nim

Created December 4, 2022 08:47
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aoc_2022_04_part1.nim
import std/[os,sequtils,strutils]
type
Assingment = tuple[fromSection, toSection: uint]
func toAssingment(rangeStr: string): Assingment =
let pair = rangeStr.split('-')
result.fromSection = parseUInt(pair[0])
result.toSection = parseUInt(pair[1])
func `<=`(self: Assingment, other: Assingment): bool =
other.fromSection <= self.fromSection and self.toSection <= other.toSection
var count = 0
for line in paramStr(1).lines:
let assignments = line.split(',').mapIt(it.toAssingment)
if assignments[0] <= assignments[1] or assignments[1] <= assignments[0]:
inc count
echo count
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aoc_2022_04_part2.nim
import std/[os,sequtils,strutils]
type
Assingment = tuple[fromSection, toSection: uint]
func toAssingment(rangeStr: string): Assingment =
let pair = rangeStr.split('-')
result.fromSection = parseUInt(pair[0])
result.toSection = parseUInt(pair[1])
func sections(self: Assingment): Slice[uint] =
self.fromSection .. self.toSection
func `<=`(self: Assingment, other: Assingment): bool =
other.fromSection <= self.fromSection and self.toSection <= other.toSection
func overlap(a: Assingment, b: Assingment): bool =
b.fromSection in a.sections or b.toSection in a.sections or a <= b
var count = 0
for line in paramStr(1).lines:
let assignments = line.split(',').mapIt(it.toAssingment)
if overlap(assignments[0], assignments[1]):
inc count
echo count
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