diff options
Diffstat (limited to '22.15')
| -rw-r--r-- | 22.15/main.py | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/22.15/main.py b/22.15/main.py index c366999..9b21981 100644 --- a/22.15/main.py +++ b/22.15/main.py @@ -1,4 +1,4 @@ -import sys, re +import sys, re, itertools # ranges are inclusive from both ends def range_intersect(a, b): @@ -24,18 +24,54 @@ class RangeSet: data = [] for line in sys.stdin: - data.append([int(n) for n in re.findall('\d+', line)]) + data.append([int(n) for n in re.findall('-?\d+', line)]) -manhattan = [abs(a[0] - a[2]) + abs(a[1] - a[3]) for a in data] +def manhattan(a): + return abs(a[0] - a[2]) + abs(a[1] - a[3]) def partOne(y): r = RangeSet() - for l, m in zip(data, manhattan): + for l in data: + m = manhattan(l) w = m - abs(l[1] - y) if w < 0: continue - #print(l, w, l[0] - w, l[0] + w) r.add(l[0] - w, l[0] + w) beacons = set([(a[2], a[3]) for a in data if a[3] == y]) return r.size() - len(beacons) -print(partOne(2000000)) +def vis(size): + s = '' + for y in range(size): + for x in range(size): + c = ' ' + for l in data: + m = abs(l[0] - l[2]) + abs(l[1] - l[3]) + if abs(l[0] - x) + abs(l[1] - y) <= m: + c = '#' + break + if (x, y) in [(a[0], a[1]) for a in data]: + c = 'S' + if (x, y) in [(a[2], a[3]) for a in data]: + c = 'B' + s += c + s += '\n' + return s + +def partTwo(): + for y in range(4000000): + if y % 4000 == 0: print(y / 40000) + r = RangeSet() + for l in data: + m = manhattan(l) + w = m - abs(l[1] - y) + if w < 0: continue + r.add(l[0] - w, l[0] + w) + l = len(r.rs) + if l == 0: break + if l != 1: + print(r.rs, y) + x = r.rs[0][1] + 1 + return 4000000 * x + y + +#print(partOne(2000000)) +print(partTwo()) |