From 10b70059a45c8d8261e0510d4c9ce4108f8b5b3d Mon Sep 17 00:00:00 2001 From: Xevion Date: Tue, 3 Dec 2019 00:17:54 -0600 Subject: [PATCH] day 3 part 1 & part 2 --- 2019/day-3/input | 2 ++ 2019/day-3/python/main.py | 69 +++++++++++++++++++++++++++++++++++++++ README.md | 2 +- 3 files changed, 72 insertions(+), 1 deletion(-) create mode 100644 2019/day-3/input create mode 100644 2019/day-3/python/main.py diff --git a/2019/day-3/input b/2019/day-3/input new file mode 100644 index 0000000..3367598 --- /dev/null +++ b/2019/day-3/input @@ -0,0 +1,2 @@ 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\ No newline at end of file diff --git a/2019/day-3/python/main.py b/2019/day-3/python/main.py new file mode 100644 index 0000000..dd46791 --- /dev/null +++ b/2019/day-3/python/main.py @@ -0,0 +1,69 @@ +import os +import sys + +PATH = os.path.join(sys.path[0], '..', 'input') +DATA = [line for line in open(PATH, 'r').readlines()] + +class Flag(object): + def __init__(self, o=False, t=False): + self.first = o + self.second = t + + self.fstep = -1 + self.sstep = -1 + + def mark(self, f, step): + if f == 0 and self.fstep == -1: + self.fstep = step + elif f == 1 and self.sstep == -1: + self.sstep = step + + + @property + def intersect(self): + return self.first and self.second + +synth = lambda pos : f'{pos[0]},{pos[1]}' +grid = {} +offsets = { + 'L' : (-1, 0), + 'R' : (1, 0), + 'U' : (0, 1), + 'D' : (0, -1) +} + +for f, line in enumerate(DATA): + curpos = [0, 0] + step = 0 + + for command in line.split(','): + offset = offsets[command[0]] + magnitude = int(command[1:]) + + for y in range(1, magnitude + 1): + step += 1 + curpos[0] += offset[0] + curpos[1] += offset[1] + key = synth(curpos) + + if key in grid.keys(): + if f == 0: + grid[key].first = True + elif f == 1: + grid[key].second = True + grid[key].mark(f, step) + else: + grid[key] = Flag(o=True) if f == 0 else Flag(t=True) + grid[key].mark(f, step) + +# Part 1 +manhattan = lambda d : sum(abs(int(n)) for n in d.split(',')) +select = list(filter(lambda item : grid[item].intersect, grid.keys())) +select = list(map(manhattan, select)) +print(min(select)) + +# Part 2 +combo = lambda x : grid[x].fstep + grid[x].sstep +found = list(filter(lambda item : grid[item].intersect, grid.keys())) +found = list(map(combo, found)) +print(min(found)) \ No newline at end of file diff --git a/README.md b/README.md index 374c1b8..d58195f 100644 --- a/README.md +++ b/README.md @@ -17,7 +17,7 @@ Day 1 - :heavy_check_mark: Day 2 - :heavy_check_mark: -Day 3 - :x: +Day 3 - :heavy_check_mark: Day 4 - :x: