Started working on 2024/10 P1

2024/10/10.md

@@ -0,0 +1,106 @@
+## \-\-- Day 10: Hoof It \-\--
+
+You all arrive at a [Lava Production Facility](/2023/day/15) on a
+floating island in the sky. As the others begin to search the massive
+industrial complex, you feel a small nose boop your leg and look down to
+discover a reindeer wearing a hard
+hat.
+
+The reindeer is holding a book titled \"Lava Island Hiking Guide\".
+However, when you open the book, you discover that most of it seems to
+have been scorched by lava! As you\'re about to ask how you can help,
+the reindeer brings you a blank [topographic
+map](https://en.wikipedia.org/wiki/Topographic_map) of
+the surrounding area (your puzzle input) and looks up at you excitedly.
+
+Perhaps you can help fill in the missing hiking trails?
+
+The topographic map indicates the *height* at each position using a
+scale from `0` (lowest) to `9` (highest). For example:
+
+    0123
+    1234
+    8765
+    9876
+
+Based on un-scorched scraps of the book, you determine that a good
+hiking trail is *as long as possible* and has an *even, gradual, uphill
+slope*. For all practical purposes, this means that a *hiking trail* is
+any path that starts at height `0`, ends at height `9`, and always
+increases by a height of exactly 1 at each step. Hiking trails never
+include diagonal steps - only up, down, left, or right (from the
+perspective of the map).
+
+You look up from the map and notice that the reindeer has helpfully
+begun to construct a small pile of pencils, markers, rulers, compasses,
+stickers, and other equipment you might need to update the map with
+hiking trails.
+
+A *trailhead* is any position that starts one or more hiking trails -
+here, these positions will always have height `0`. Assembling more
+fragments of pages, you establish that a trailhead\'s *score* is the
+number of `9`-height positions reachable from that trailhead via a
+hiking trail. In the above example, the single trailhead in the top left
+corner has a score of `1` because it can reach a single `9` (the one in
+the bottom left).
+
+This trailhead has a score of `2`:
+
+    ...0...
+    ...1...
+    ...2...
+    6543456
+    7.....7
+    8.....8
+    9.....9
+
+(The positions marked `.` are impassable tiles to simplify these
+examples; they do not appear on your actual topographic map.)
+
+This trailhead has a score of `4` because every `9` is reachable via a
+hiking trail except the one immediately to the left of the trailhead:
+
+    ..90..9
+    ...1.98
+    ...2..7
+    6543456
+    765.987
+    876....
+    987....
+
+This topographic map contains *two* trailheads; the trailhead at the top
+has a score of `1`, while the trailhead at the bottom has a score of
+`2`:
+
+    10..9..
+    2...8..
+    3...7..
+    4567654
+    ...8..3
+    ...9..2
+    .....01
+
+Here\'s a larger example:
+
+    89010123
+    78121874
+    87430965
+    96549874
+    45678903
+    32019012
+    01329801
+    10456732
+
+This larger example has 9 trailheads. Considering the trailheads in
+reading order, they have scores of `5`, `6`, `5`, `3`, `1`, `3`, `5`,
+`3`, and `5`. Adding these scores together, the sum of the scores of all
+trailheads is `36`.
+
+The reindeer gleefully carries over a protractor and adds it to the
+pile. *What is the sum of the scores of all trailheads on your
+topographic map?*
+
+To begin, [get your puzzle input](10/input).
+
+Answer:
+

2024/10/solution.py

@@ -0,0 +1,31 @@
+#!/bin/python3
+import sys,time,re
+from pprint import pprint
+sys.path.insert(0, '../../')
+from fred import list2int,get_re,nprint,lprint,loadFile,toGrid,TSP,dijkstra
+start_time = time.time()
+
+input_f = 'test'
+
+part = 1
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+
+if part == 1:
+    grid = toGrid(input_f,True)
+    nprint(grid)
+
+    print(dijkstra(grid,0,9))
+
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+if part == 2:
+    exit()
+
+print("--- %s seconds ---" % (time.time() - start_time))

2024/10/solution_old.py

@@ -0,0 +1,162 @@
+#!/bin/python3
+import sys,time,re
+from pprint import pprint
+sys.path.insert(0, '../../')
+from fred import list2int,get_re,nprint,lprint,loadFile,toGrid, get_value_in_direction,addTuples
+start_time = time.time()
+
+input_f = 'test2'
+
+part = 1
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+
+if part == 1:
+    
+
+    def get_value_in_direction(grid, position, direction=None, length=1, type: str = None):
+        """
+        Get the value(s) in a specified direction from a given position in a grid.
+        If no direction is provided, returns the value at the current position.
+
+        Args:
+            grid (list of list of int/float/str): The 2D grid.
+            position (set): A set containing x (row index) and y (column index) as integers.
+            direction (str, optional): The direction to check. Defaults to None.
+            length (int, optional): The number of steps to check in the given direction. Default is 1.
+            type (str, optional): The type of result to return ('list' or 'str'). Defaults to None.
+
+        Returns:
+            list or str: A list or string of values in the specified direction, or a single value.
+
+        Raises:
+            ValueError: If direction is invalid or position is not a set of two integers.
+            TypeError: If grid is not a list of lists.
+        """
+        if not all(isinstance(row, list) for row in grid):
+            raise TypeError("Grid must be a list of lists.")
+        
+        # Ensure position is a set of two integers
+        if len(position) != 2 or not all(isinstance(coord, int) for coord in position):
+            raise ValueError("Position must be a set containing two integers (x, y).")
+
+        x, y = position
+        offsets = {
+            'up': (-1, 0),
+            'down': (1, 0),
+            'left': (0, -1),
+            'right': (0, 1),
+            'up-left': (-1, -1),
+            'up-right': (-1, 1),
+            'down-left': (1, -1),
+            'down-right': (1, 1)
+        }
+        
+        # If no direction is given, return the value at the current position
+        if direction is None:
+            if 0 <= x < len(grid) and 0 <= y < len(grid[x]):
+                return grid[x][y]
+            else:
+                return None
+
+        # Validate direction
+        if direction not in offsets:
+            raise ValueError(f"Invalid direction: {direction}. Choose from {list(offsets.keys())}")
+        
+        dx, dy = offsets[direction]
+        new_x, new_y = x + dx, y + dy
+        
+        values = []
+
+        if length == 1:
+            # Check for out-of-bounds
+            if 0 <= new_x < len(grid) and 0 <= new_y < len(grid[new_x]):
+                return grid[new_x][new_y]
+            else:
+                return None
+        else:
+            for step in range(length):
+                new_x, new_y = x + step * dx, y + step * dy
+                # Check for out-of-bounds
+                if 0 <= new_x < len(grid) and 0 <= new_y < len(grid[new_x]):
+                    values.append(grid[new_x][new_y])
+                else:
+                    return []  # Return empty list if any position is out of bounds
+        if type == 'list':
+            return values
+        elif type == 'str':
+            return ''.join(values)
+        else:
+            return values
+
+    grid = toGrid(input_f,True)
+
+    def extract_tuples(nested_list):
+        result = []
+        for item in nested_list:
+            if isinstance(item, tuple):  # Check if the item is a tuple
+                result.append(item)
+            elif isinstance(item, list):  # If it's a list, recurse into it
+                result.extend(extract_tuples(item))
+        return result
+
+    def find_path(grid,pos:set,cur):
+        path = 0
+        if cur == 9:
+            return 1
+
+        cur+=1
+        
+        
+        if get_value_in_direction(grid,pos,'up') == cur:
+            path += find_path(grid,addTuples(pos,(-1,0)),cur)        
+
+        if get_value_in_direction(grid,pos,'down') == cur:
+            path += find_path(grid,addTuples(pos,(1,0)),cur)
+
+        if get_value_in_direction(grid,pos,'left') == cur:
+            path += find_path(grid,addTuples(pos,(0,-1)),cur)
+
+        if get_value_in_direction(grid,pos,'right') == cur:
+            path += find_path(grid,addTuples(pos,(0,1)),cur)
+                
+        
+        return path
+
+    result = 0
+
+    for r, row in enumerate(grid):
+        for c, col in enumerate(row):
+             #get_value_in_direction(grid, position, direction=None, length=1, type: str = None):
+            if grid[r][c] == 0:
+                if get_value_in_direction(grid,(r,c),'up') == 1:
+                        #print(find_path(grid,(r-1,c),1))
+                        result += find_path(grid,(r-1,c),1)
+
+                if get_value_in_direction(grid,(r,c),'down') == 1:
+                        result += find_path(grid,(r+1,c),1)
+                        #print(find_path(grid,(r+1,c),1,0))
+
+                if get_value_in_direction(grid,(r,c),'left') == 1:
+                        result += find_path(grid,(r,c-1),1)
+                        #print(find_path(grid,(r,c-1),1,0))
+                
+                if get_value_in_direction(grid,(r,c),'right') == 1:
+                        result += find_path(grid,(r,c+1),1)
+                        #print(find_path(grid,(r,c+1),1,0))
+
+    print(result)
+
+
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+if part == 2:
+    exit()
+
+print("--- %s seconds ---" % (time.time() - start_time))

fred.py

@@ -66,14 +66,12 @@ def toGrid(input, parser=None):
         FileNotFoundError: If the file cannot be found (if input is a file path).
         ValueError: If the parser function is invalid.
     """
-    if parser is not None and not callable(parser):
+
-        raise ValueError("The parser must be a callable function.")
-    
     grid = []
     try:
         with open(input) as file:
             for line in file:
-                grid.append(list2int(line.rstrip()) if parser else list(line.rstrip()))  # Use parser or default processing
+                grid.append(list2int(list(line.rstrip())) if parser else list(line.rstrip()))  # Use parser or default processing
     except FileNotFoundError:
         raise FileNotFoundError(f"The file '{input}' was not found.")
     except IOError as e: