From b8329f2c1a9af42d8c9a07e4dade232775a70bc8 Mon Sep 17 00:00:00 2001 From: Marijn Doeve Date: Fri, 3 Dec 2021 14:33:25 +0100 Subject: [PATCH] 3 --- 3.py | 66 ++++ AoC3/main.swift | 6 +- ex3.in | 12 + input3.in | 1000 +++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1083 insertions(+), 1 deletion(-) create mode 100644 3.py create mode 100644 ex3.in create mode 100644 input3.in diff --git a/3.py b/3.py new file mode 100644 index 0000000..10eb917 --- /dev/null +++ b/3.py @@ -0,0 +1,66 @@ +import sys + +bitstrings = [] + +for x in sys.stdin: + bitstrings.append(x.rstrip()) + +transposed_bits = zip(*bitstrings) + +gamma_bit = "" +epsilon_bit = "" + +for bit in transposed_bits: + if bit.count("0") > len(bit) // 2: + gamma_bit += "0" + epsilon_bit += "1" + else: + gamma_bit += "1" + epsilon_bit += "0" + +gamma = int(gamma_bit, base=2) +epsilon = int(epsilon_bit, base=2) + +print("a:", gamma * epsilon) + +remaining = bitstrings + +current_bit = 0 +while len(remaining) > 1: + zipped = list(zip(*remaining)) + common_value = ( + "1" if zipped[current_bit].count("1") >= zipped[current_bit].count("0") else "0" + ) + new_bits = [] + + for bits in remaining: + if bits[current_bit] == common_value: + new_bits.append(bits) + + remaining = new_bits + + current_bit += 1 + + +ox_rating = int(remaining[0], base=2) + +remaining = bitstrings + +current_bit = 0 +while len(remaining) > 1: + zipped = list(zip(*remaining)) + least_common_value = ( + "0" if zipped[current_bit].count("1") >= zipped[current_bit].count("0") else "1" + ) + new_bits = [] + + for bits in remaining: + if bits[current_bit] == least_common_value: + new_bits.append(bits) + + remaining = new_bits + + current_bit += 1 + +co2_rating = int(remaining[0], base=2) +print("b:", ox_rating * co2_rating) diff --git a/AoC3/main.swift b/AoC3/main.swift index 9ef755f..01d6abd 100644 --- a/AoC3/main.swift +++ b/AoC3/main.swift @@ -7,5 +7,9 @@ import Foundation -print("Hello, World!") +let fileContent = try! String(contentsOfFile: CommandLine.arguments[1]) + +for line in fileContent.trimmingCharacters(in: .newlines).components(separatedBy: .newlines) { + +} diff --git a/ex3.in b/ex3.in new file mode 100644 index 0000000..a6366a8 --- /dev/null +++ b/ex3.in @@ -0,0 +1,12 @@ +00100 +11110 +10110 +10111 +10101 +01111 +00111 +11100 +10000 +11001 +00010 +01010 diff --git a/input3.in b/input3.in new file mode 100644 index 0000000..cfdb165 --- /dev/null +++ b/input3.in @@ -0,0 +1,1000 @@ +000110010001 +101000110000 +000110010111 +100011100010 +111001100001 +001010001010 +010100100101 +011000010000 +111111011010 +001111011101 +011011010010 +001100010101 +001010101100 +000000000000 +100010111111 +100100110011 +111100100001 +011110001110 +000110100101 +011101111001 +111101110110 +101001001111 +010111100010 +001110100011 +110010111101 +110000001101 +110110111101 +101100000110 +101101010110 +001011001110 +111110000111 +011110010110 +011001110100 +110101101110 +101110001100 +100111000010 +101111010001 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