package main

type IntervalSort [][2]uint64

func (is IntervalSort) Len() int           { return len(is) }
func (is IntervalSort) Swap(i, j int)      { is[i], is[j] = is[j], is[i] }
func (is IntervalSort) Less(i, j int) bool { return is[i][0] < is[j][0] }

type MapperSort []Mapper

func (ms MapperSort) Len() int           { return len(ms) }
func (ms MapperSort) Swap(i, j int)      { ms[i], ms[j] = ms[j], ms[i] }
func (ms MapperSort) Less(i, j int) bool { return ms[i].source < ms[j].source }

type Input struct {
	seedIntervals         [][2]uint64
	seedToSoil            []Mapper
	soilToFertilizer      []Mapper
	fertilizerToWater     []Mapper
	waterToLight          []Mapper
	lightToTemperature    []Mapper
	temperatureToHumidity []Mapper
	humidityToLocation    []Mapper
}

type Mapper struct {
	source uint64
	target uint64
	count  uint64
}