2022 day 8

2022/08/part1

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+TGRID = [] # heights
+VGRID = [] # visibility
+
+def check_visible(x, y, xr, yr):
+    target = TGRID[y][x]
+    for y in yr:
+        for x in xr:
+            if TGRID[y][x] >= target:
+                return False
+    return True
+
+with open('input') as f:
+    for line in f:
+        l = []
+        for tree in line.rstrip():
+            l.append(int(tree))
+        TGRID.append(l)
+
+max_y = len(TGRID)
+for y in range(0, max_y):
+    max_x = len(TGRID[y])
+    l = []
+    for x in range(0, max_x):
+        l.append(
+            check_visible(x, y, range(0, x), range(y, y+1)) or # left to right
+            check_visible(x, y, range(x, x+1), range(0, y)) or # top to bottom
+            check_visible(x, y, range(max_x-1, x, -1), range(y, y+1)) or # right to left
+            check_visible(x, y, range(x, x+1), range(max_y-1, y, -1)) # bottom to top
+        )
+    VGRID.append(l)
+
+count = 0
+for row in VGRID:
+    for col in row:
+        if col:
+            count = count + 1
+
+print(count)