Add AoC 2024 day 02 solver

assets/advent_of_code/2024_02_sample.txt

@@ -0,0 +1,6 @@
+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9

lib/solvers/advent_of_code/2024/_all_solvers.dart

@@ -1 +1,2 @@
 export 'day_01_solver.dart';
+export 'day_02_solver.dart';

lib/solvers/advent_of_code/2024/day_02_solver.dart

@@ -0,0 +1,52 @@
+import 'package:h3x_devtools/solvers/advent_of_code/2024/aoc_2024_solver.dart';
+
+class Day02Solver extends AdventOfCode2024Solver {
+
+  @override
+  final int dayNumber = 2;
+
+  @override
+  String getSolution(String input) {
+    List<List<int>> leveledReports = input.splitLines().map((line) => line.split(' ').parsedAsInts.toList()).toList();
+
+    // Part 1
+    int safeReports = _getSaveReports(leveledReports, false);
+
+    // Part 2
+    int safeReportsWith = _getSaveReports(leveledReports, true);
+
+    return 'Safe reports: $safeReports, Safe reports when allowing one error: $safeReportsWith';
+  }
+
+  int _getSaveReports(List<List<int>> leveledReports, bool allowInvalidLevel) {
+    return leveledReports.where((report) {
+      bool result = _getReportSafe(report);
+      int i = 0;
+      while (!result && allowInvalidLevel && i < report.length) {
+        result = _getReportSafe(report.toList()..removeAt(i));
+        i++;
+      }
+      return result;
+    }).length;
+  }
+
+  bool _getReportSafe(List<int> report) {
+    int maxInc = 0, maxDec = 0;
+
+    for (int i = 0; i < report.length - 1; i++) {
+      var currentLevel = report[i];
+      var nextLevel = report[i + 1];
+
+      int inc = nextLevel - currentLevel;
+      maxInc = inc > 0 ? max(maxInc, inc) : maxInc;
+      maxDec = inc < 0 ? max(maxDec, inc.abs()) : maxDec;
+
+      if (inc == 0 || !((maxInc == 0 && maxDec >= 1 && maxDec <= 3) || (maxInc >= 1 && maxInc <= 3 && maxDec == 0))) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+}