From 61abf54942bc2b57262c4db1acecdd76979788dd Mon Sep 17 00:00:00 2001 From: kleph Date: Mon, 6 Dec 2021 14:14:20 +0100 Subject: [PATCH] Day 3 part 2 --- .gitignore | 2 + 3/3_2.py | 82 +++++ 3/input.txt | 1000 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1084 insertions(+) create mode 100644 .gitignore create mode 100755 3/3_2.py create mode 100644 3/input.txt diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ca3c9ea --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +.idea +*.swp diff --git a/3/3_2.py b/3/3_2.py new file mode 100755 index 0000000..d4c1f7c --- /dev/null +++ b/3/3_2.py @@ -0,0 +1,82 @@ +#!/usr/bin/env python +# 2021 - Advent Of Code - 3 part2 + +import re + +re_parse = re.compile(r'(\d)'*12) +MOST = 1 +LEAST = 0 + + +def freq_bits(buf, mode): + count = [0] * 12 + co2_freq = [0] * 12 + oxy = [0] * 12 + for line in buf: + m = re_parse.match(line) + + for i in range(12): + if m.group(i+1) == '1': + count[i] += 1 + + for i in range(12): + if count[i] >= len(buf) / 2: + oxy[i] = 1 + else: + oxy[i] = 0 + + for i in range(12): + if count[i] > len(buf) / 2: + co2_freq[i] = 1 + else: + co2_freq[i] = 0 + + if mode == MOST: + return oxy + elif mode == LEAST: + co2_freq = [0 if x == 1 else 1 for x in oxy] + return co2_freq + + +def filter_pos(line_buffer, position, value): + for line in line_buffer: + if line[position] == value: + yield line + + +def filter_freq(buffer, freq_buf, mode): + i = 0 + while i in range(12) and len(buffer) > 1: + buffer = list(filter_pos(buffer, i, str(freq_buf[i]))) + freq_buf = freq_bits(buffer, mode) + print(len(buffer)) + i += 1 + + return buffer + + +line_buf = [] +with open('input.txt') as f: + for line in f: + line_buf.append(line) + +gamma_count = freq_bits(line_buf, MOST) +gamma_bin = "".join([str(x) for x in gamma_count]) +gamma = int(gamma_bin, 2) + +epsilon_count = freq_bits(line_buf, LEAST) +epsilon_bin = "".join([str(x) for x in epsilon_count]) +epsilon = int(epsilon_bin, 2) + +print(f'gamma_bin {gamma_bin}, gamma: {gamma}') +print(f'epsilon_bin {epsilon_bin}, epsilon: {epsilon}') + +oxybuf = filter_freq(line_buf, gamma_count, MOST) +co2buf = filter_freq(line_buf, epsilon_count, LEAST) + +oxygen = int(oxybuf[0].strip(), 2) +print(f'oxybuf: {oxybuf}, oxygen: {oxygen}') + +co2 = int(co2buf[0].strip(), 2) +print(f'co2buf: {co2buf}, co2: {co2}') +print(f'life support: {oxygen}, {co2} => {oxygen * co2}') diff --git a/3/input.txt b/3/input.txt new file mode 100644 index 0000000..7320494 --- /dev/null +++ b/3/input.txt @@ -0,0 +1,1000 @@ +111100000101 +001110100010 +101110110011 +100000001101 +001101010011 +101111110000 +011101110001 +000000010111 +011011000010 +110110010000 +011101000000 +110010001001 +101110100111 +001001101111 +101001011010 +101001000001 +101110111101 +010100101100 +001000110010 +010100011110 +100100000001 +000110011000 +110100100001 +111000110000 +000111100100 +101100110100 +101111101001 +101110101001 +010010110001 +000111100001 +001100001000 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