Ansible Advent of Code 2023, Day 6

day6.yml

---
# Set the input
- name: Set example input
  ansible.builtin.set_fact:
    day6_input: |-
      Time:      7  15   30
      Distance:  9  40  200
  when: day6_input is not defined

# Just split the input into a list of lists and remove unnecessary whitespace
- name: Get a list of times and distances
  ansible.builtin.set_fact:
    unprocessed_list: "{{ unprocessed_list | default([]) + [current_time_dict] }}"
  vars:
    current_time_dict: "{{ item[1] | trim | regex_replace('[ ]+', ' ') | split(' ') | map('trim') | list }}"
  loop: "{{ day6_input | split('\n') | map('split', ': ') | list }}"

# Set a list of lists, each list is [time, distance]
- name: Set list of "time - distance"
  ansible.builtin.set_fact:
    time_distance_list: "{{ time_distance_list | default([]) + [current_time_distance] }}"
  vars:
    current_time_distance: "{{ [item[0], item[1]] }}"
  loop: "{{ unprocessed_list[0] | zip(unprocessed_list[1]) | list }}"

# Some brute force that just checks how many wins there are for each time-distance pair
- name: Calculate wins for each time-distance pair
  ansible.builtin.set_fact:
    possible_wins: "{{ possible_wins | default([]) + [bruteforce_wins | trim] }}"
  vars:
    duration: "{{ item[0] | int }}"
    distance: "{{ item[1] | int }}"
    # STUPID QUADRATICS SHIT IM TOO DUMB FOR! I DROPPED OUT OF HIGH SCHOOL
    # max_time: "{{ (duration | int + ((duration | int ** 2) - (4 * distance | int)) ** 0.5) / 2 }}"
    # min_time: "{{ (duration | int - ((duration | int ** 2) - (4 * distance | int)) ** 0.5) / 2 }}"

    # SHIT. DOESNT. FUCKING. WORK!
    # Why is the 3rd one wrong??
    # max_time_floor: "{{ max_time | int }}"
    # min_time_ceil: "{{ min_time | int + 1 }}"

    # No!!!!! im off by one!
    # possible_wins_current: "{{ max_time_floor | int - min_time_ceil | int  + 1 }}"

    # Brute force solution:
    bruteforce_wins: "
      {%- set ns = namespace(count = 0) -%}
      {% for i in range(0, duration | int) %}
        {% if (i * duration | int - i | int ** 2 ) > distance | int %}
          {%- set ns.count = ns.count | int + 1 -%}
        {% endif %}
      {% endfor %}
      {{ ns.count }}"
  loop: "{{ time_distance_list }}"

# Multiply them with each other
- name: Multiply every win count with each other
  ansible.builtin.set_fact:
    multiplied_values: "{{ multiplied_values | default(possible_wins[item]) | int * possible_wins[item + 1] | int }}"
  loop: "{{ range(0, possible_wins | length - 1) }}"

# Return the multiplied results
- name: ANSWER TO PART 1 | Return product of all wins
  ansible.builtin.debug:
    msg: "{{ multiplied_values }}"

# Just remove the whitespace and get the numbers
- name: Get a list of times and distances without whitespace
  ansible.builtin.set_fact:
    duration: "{{ split_lines[0][1] | regex_replace('[ ]+', '') | trim | int }}"
    distance: "{{ split_lines[1][1] | regex_replace('[ ]+', '') | trim | int }}"
  vars:
    split_lines: "{{ day6_input | split('\n') | map('split', ':') | list }}"

# So this part is obviously designed to deter you from using brute force and use quadratic equations instead.
# I dont give a fuck! I'll run it overnight if I have to! Fuck off!
- name: Calculate wins for this one integer.
  ansible.builtin.set_fact:
    possible_wins_part2: "{{ bruteforce_wins }}"
  vars:
    bruteforce_wins: "
      {%- set ns = namespace(count = 0) -%}
      {% for i in range(0, duration | int) %}
        {% if (i * duration | int - i | int ** 2 ) > distance | int %}
          {%- set ns.count = ns.count | int + 1 -%}
        {% endif %}
      {% endfor %}
      {{ ns.count }}"

# Get the copies of each card, sum them
- name: ANSWER TO PART 2 | Return how many wins there are
  ansible.builtin.debug:
    msg: "{{ possible_wins_part2 | trim }}"

# cool that worked
# lesson learnt. dont bother with math. im too dumb for that shit
...