From 036a563d8f43a4167cb402f9a807be0affa6d94e Mon Sep 17 00:00:00 2001 From: Andrew Ekstedt Date: Thu, 8 Dec 2022 21:13:53 -0800 Subject: [PATCH] day 9 python part 1 --- day09/day09.py | 50 ++ day09/input | 2000 ++++++++++++++++++++++++++++++++++++++++++++++++ day09/sample | 8 + 3 files changed, 2058 insertions(+) create mode 100644 day09/day09.py create mode 100644 day09/input create mode 100644 day09/sample diff --git a/day09/day09.py b/day09/day09.py new file mode 100644 index 0000000..bfeb529 --- /dev/null +++ b/day09/day09.py @@ -0,0 +1,50 @@ +H = (0,0) +T = (0,0) +def go(p, dir): + x,y = p + if dir == "U": + y += 1 + if dir == "D": + y -= 1 + if dir == "L": + x -= 1 + if dir == "R": + x += 1 + return x,y + +def follow(): + if H == T: + return T + if abs(H[0] - T[0]) <= 1 and abs(H[1] - T[1]) <= 1: + return T + if H[1] == T[1]: + x,y = T + x = H[0] - sgn(H[0] - T[0]) + return x,y + if H[0] == T[0]: + x,y = T + y = H[1] - sgn(H[1]-T[1]) + return x,y + # diagonal + x,y = T + x += sgn(H[0] - T[0]) + y += sgn(H[1] - T[1]) + return x,y + +def sgn(x): + if x==0: return 0 + if x > 0: return 1 + return -1 + +visited = set([T]) +for line in open("input"): + dir, count = line.split() + count = int(count) + for _ in range(count): + H = go(H, dir) + T = follow() + visited.add(T) + print(H,T) +print(len(visited)) + + diff --git a/day09/input b/day09/input new file mode 100644 index 0000000..5a9a18f --- /dev/null +++ b/day09/input @@ -0,0 +1,2000 @@ +U 1 +L 1 +R 2 +L 1 +D 2 +R 1 +U 2 +R 1 +U 1 +R 2 +D 2 +L 1 +R 1 +D 2 +R 1 +L 1 +R 1 +D 1 +U 1 +R 1 +L 1 +R 2 +U 1 +R 1 +D 2 +L 2 +U 1 +R 1 +D 1 +L 1 +R 1 +L 2 +D 1 +U 1 +D 2 +R 2 +D 2 +R 2 +D 2 +R 2 +U 1 +L 2 +R 2 +D 2 +L 2 +U 2 +R 1 +L 1 +U 1 +R 1 +D 1 +R 1 +L 1 +R 1 +D 2 +L 2 +U 1 +R 1 +L 1 +R 1 +U 2 +D 2 +U 2 +L 1 +U 2 +L 1 +R 2 +U 2 +D 1 +L 1 +R 1 +L 2 +U 1 +D 2 +R 2 +U 2 +R 1 +L 1 +U 2 +R 2 +L 1 +R 2 +D 1 +U 2 +D 2 +R 2 +L 1 +R 1 +U 2 +D 2 +U 2 +D 1 +U 1 +R 2 +D 1 +R 1 +L 1 +D 2 +L 2 +U 2 +R 2 +U 1 +R 2 +U 1 +D 1 +R 2 +U 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