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Complete Day 4

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Bearmine
2025-12-09 15:09:42 -06:00
parent 016f8405e7
commit 08ac0266fc
1 changed files with 36 additions and 15 deletions
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55
lib/day4/command.dart
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@@ -15,7 +15,7 @@ List getAdjacent(List<List<bool>> map, int idx, int idy) {
//print("$xSlewed, $ySlewed"); //print("$xSlewed, $ySlewed");
try { try {
//print(map[ySlewed][xSlewed]); //print(map[ySlewed][xSlewed]);
adjacentValues.insert(adjacentValues.length, map[ySlewed][xSlewed]); adjacentValues.add(map[ySlewed][xSlewed]);
} on RangeError { } on RangeError {
continue; continue;
} }
@@ -24,6 +24,30 @@ List getAdjacent(List<List<bool>> map, int idx, int idy) {
return adjacentValues; return adjacentValues;
} }
(int, List<List<bool>>) removeRolls(List<List<bool>> rollMap) {
int rollsRemoved = 0;
List<List<bool>> newRollMap = List.from(
rollMap.map((e) => List<bool>.from(e, growable: false)),
growable: false,
);
for (var (y, row) in rollMap.indexed) {
for (var (x, columnValue) in row.indexed) {
if (columnValue == true) {
var numAdjacent = getAdjacent(
rollMap,
x,
y,
).where((value) => value).length;
if (numAdjacent < 4) {
rollsRemoved++;
newRollMap[y][x] = false;
}
}
}
}
return (rollsRemoved, newRollMap);
}
class Day4Command extends Command { class Day4Command extends Command {
// The [name] and [description] properties must be defined by every // The [name] and [description] properties must be defined by every
// subclass. // subclass.
@@ -68,21 +92,18 @@ class Day4Command extends Command {
//print(paperRollMap); //print(paperRollMap);
//print(getAdjacent(paperRollMap, 0, 0)); //print(getAdjacent(paperRollMap, 0, 0));
int accumulator = 0; int round = 1;
for (var (y, row) in paperRollMap.indexed) { int totalRollsRemoved = 0;
for (var (x, columnValue) in row.indexed) { while (true) {
if (columnValue == true) { int rollsRemoved;
var numAdjacent = getAdjacent( (rollsRemoved, paperRollMap) = removeRolls(paperRollMap);
paperRollMap, print("Rolls Removed During Round $round: $rollsRemoved");
x, if (rollsRemoved == 0) {
y, break;
).where((value) => value).length; }
if (numAdjacent < 4) { totalRollsRemoved += rollsRemoved;
accumulator++; round++;
} }
} print("Total Rolls Removed: $totalRollsRemoved");
}
}
print("Part 1 Result: $accumulator");
} }
} }