Day 3

2020/03/03.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+# Advent Of Code 2020 - Day 3
+
+"""
+...#.#..#..#..#..............##
+.##.......###.#......#....#..##
+..##.##.#......#....#..#...#..#
+
+
+..##.......
+"""
+
+filename = "input.txt"
+
+with open(filename) as f:
+    content = f.readlines()
+
+trees = 0
+
+totalRows = len(content)-1
+totalColumns = len(content[0])-1
+
+#print (totalColumns)
+#print (totalRows)
+
+    
+x,y = 0,0
+moveRight = 3
+moveDown = 1
+
+row = 0
+
+while row < totalRows:
+    
+    x = x + moveDown
+    y = y + moveRight
+   
+
+    if y >= totalColumns:
+        y = y - totalColumns
+#        print (y)
+
+#    print (x, y)
+    if content[x][y] == "#":
+         trees = trees + 1
+    
+    row = row +1
+
+print (trees)
+
+"""
+0,0
+right 3, down 1
++3,+1
+
+check if y is >= len(content)
+    print trees result
+
+check if x is >= len(line)
+    move to start of the line and continue
+
+"""

2020/03/03b.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python3
+
+# Advent Of Code 2020 - Day 3
+
+"""
+...#.#..#..#..#..............##
+.##.......###.#......#....#..##
+..##.##.#......#....#..#...#..#
+
+
+..##.......
+
+Right 1, down 1.
+Right 3, down 1. (This is the slope you already checked.)
+Right 5, down 1.
+Right 7, down 1.
+Right 1, down 2.
+
+multiply all runs
+
+
+"""
+#[right,down]
+runs = [[1,1],
+        [3,1],
+        [5,1],
+        [7,1],
+        [1,2]]
+
+
+
+filename = "input.txt"
+
+with open(filename) as f:
+    content = f.readlines()
+
+treesTotal = 1
+
+totalRows = len(content)-1
+totalColumns = len(content[0])-1
+
+print (totalColumns)
+print (totalRows)
+
+for run in runs:
+
+    x,y = 0,0
+    moveRight = run[0]
+    moveDown = run[1]
+    trees = 0
+
+    row = 0
+
+    while x < totalRows:
+        
+        x = x + moveDown
+        y = y + moveRight
+
+        # didn't bother changing the while loop, so here we check if we are over the end
+        if x > totalRows:
+            break
+
+        if y >= totalColumns:
+            y = y - totalColumns
+
+        if content[x][y] == "#":
+            trees = trees + 1
+        
+        row = row +1
+
+    treesTotal = trees * treesTotal
+
+
+print (treesTotal)

2020/03/input.txt

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+..##.##.#......#....#..#...#..#

2020/03/inputShort.txt

@@ -0,0 +1,11 @@
+..##.......
+#...#...#..
+.#....#..#.
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+.#...##..#.
+..#.##.....
+.#.#.#....#
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+#.##...#...
+#...##....#
+.#..#...#.#