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day 14 part 2
continuous-integration/drone/push Build is passing Details

This commit is contained in:
Ben Harris 2020-12-14 17:49:27 -05:00
parent cd93985b43
commit 2e504e4f7b
1 changed files with 9 additions and 10 deletions
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19
aoc2020/Day14.cs
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@ -45,7 +45,7 @@ namespace aoc2020
public override string Part2()
{
var memory = new Dictionary<long, long>();
var memory = new Dictionary<ulong, ulong>();
var mask = "";
foreach (var line in Input)
@ -58,8 +58,8 @@ namespace aoc2020
}
else
{
var value = long.Parse(spl[2]);
var addr = long.Parse(spl[0].Split(new[] {'[', ']'},
var value = ulong.Parse(spl[2]);
var addr = ulong.Parse(spl[0].Split(new[] {'[', ']'},
StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries)[1]);
var floats = new List<int>();
@ -70,22 +70,21 @@ namespace aoc2020
floats.Add(i);
break;
case '1':
addr |= (long) 1 << (35 - i);
addr |= (ulong) 1 << (35 - i);
break;
}
if (floats.Any())
{
var combos = new List<int>();
combos.AddRange(floats);
var combos = new List<ulong> { addr };
foreach (var i in floats)
{
var newCombos = new List<int>();
var newCombos = new List<ulong>();
foreach (var c in combos)
{
newCombos.Add(c | (1 << (35 - i)));
newCombos.Add(c & ~(1 << (35 - i)));
newCombos.Add(c | ((ulong) 1 << (35 - i)));
newCombos.Add(c & ~((ulong) 1 << (35 - i)));
}
combos = newCombos;
@ -101,7 +100,7 @@ namespace aoc2020
}
}
return $"{memory.Sum(w => w.Value)}";
return $"{memory.Aggregate<KeyValuePair<ulong, ulong>, ulong>(0, (current, w) => current + w.Value)}";
}
}
}