45 lines
911 B
C#
45 lines
911 B
C#
using System.Collections.Generic;
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using System.Linq;
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namespace aoc2019
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{
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internal sealed class Day1 : Day
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{
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private readonly IEnumerable<int> masses;
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public Day1()
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{
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masses = Input.Select(int.Parse);
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}
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public override int DayNumber => 1;
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private static int FuelCost(int weight)
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{
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return weight / 3 - 2;
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}
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private static int FullCost(int cost)
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{
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int total = 0, newcost, tmp = cost;
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while ((newcost = FuelCost(tmp)) >= 0)
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{
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total += newcost;
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tmp = newcost;
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}
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return total;
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}
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public override string Part1()
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{
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return $"{masses.Sum(FuelCost)}";
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}
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public override string Part2()
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{
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return $"{masses.Sum(FullCost)}";
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}
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}
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} |