diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
deleted file mode 100644
index 812c38c..0000000
--- a/.pre-commit-config.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-repos:
-    - repo: https://github.com/LiquidFun/aoc_tiles
-      rev: 0.6.2
-      hooks:
-          - id: aoc-tiles
-            # Optionally use these arguments. Auto add tiles to git adds the tiles to git,
-            # possibly amends your commit by creating the tile images and updating the README.
-            # Language sorting shows the preference of the order of the languages to use.
-            # Exclude paterns are globs which can be used to exclude files when creating
-            # the tiles. See the customization section in the README for more flags.
-            # Simply remove the comments (#) below for args and the flags you want.
-            args:
-              - --auto-add-tiles-to-git=add
-              - --contrast-improvement-type=dark
-              - --overwrite-year=2024
-            #     - --language-sorting=py,jl,kt,rs
-            #     - --exclude-patterns=2021/*/*.apl,2021/*/*.py,2021/*/*.cpp
\ No newline at end of file
diff --git a/README.md b/README.md
index 7618388..89f2022 100644
--- a/README.md
+++ b/README.md
@@ -1,29 +1 @@
-# aoc_template
-
-Template for yearly AoC-Repositories
-
-# Usage
-
-- Clone repository (or use as template in gitea)
-- Run `pip install -r requirements.txt`
-- Update main.py and start_day.py: set YEAR (near the top) to the respective year
-- Create a file named ".session" next to your main.py containing the contents of your aoc-session cookie
-
-On a given day, just call `./start_day.py -d <day_of_month>`
-
-# Not using PyCharm?
-
-Just comment out the call() to CHARMS near the end of start_day.py
-
-# Want to add AoC-Tiles?
-
-Author: https://github.com/LiquidFun/aoc_tiles
-
-- Run `pre-commit install --hook-type post-commit`
-- In .pre-commit-config.yaml change the --overwrite-year option as needed
-- Optional: Copy your .session file to session.cookie
-- For more options see: https://github.com/LiquidFun/aoc_tiles/blob/main/aoc_tiles/config.py
-
-Tiles will be added to this README between the following lines:
-<!-- AOC TILES BEGIN -->
-<!-- AOC TILES END -->
\ No newline at end of file
+# Codyssi 2024 Summer at the lab
\ No newline at end of file
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new file mode 100644
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\ No newline at end of file
diff --git a/inputs/input_2 b/inputs/input_2
new file mode 100644
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--- /dev/null
+++ b/inputs/input_2
@@ -0,0 +1,512 @@
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diff --git a/inputs/input_3 b/inputs/input_3
new file mode 100644
index 0000000..08b11ec
--- /dev/null
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\ No newline at end of file
diff --git a/inputs/input_4 b/inputs/input_4
new file mode 100644
index 0000000..255b40e
--- /dev/null
+++ b/inputs/input_4
@@ -0,0 +1,75 @@
+PGM <-> ASU
+HSM <-> XET
+EIH <-> VMV
+QRH <-> WKI
+JJF <-> KHX
+JXH <-> KHX
+ASU <-> TAZ
+IEK <-> HNX
+QBG <-> OJC
+NQA <-> FOH
+WFG <-> XBA
+FEM <-> SCD
+XZE <-> JBW
+JBW <-> JXH
+HNX <-> FOH
+FEM <-> QRH
+NQA <-> HVH
+YPS <-> YHP
+VMV <-> PGM
+WFG <-> YUJ
+TAZ <-> SCD
+XZE <-> QMZ
+XBA <-> WKI
+JJF <-> CRR
+YPS <-> XBA
+QBG <-> IEK
+CRR <-> SEV
+XET <-> HTO
+IHW <-> SEV
+HTO <-> DZV
+HSM <-> QMZ
+HVH <-> IHW
+MJB <-> COE
+OJC <-> IHW
+KIQ <-> VJZ
+STT <-> VJZ
+XBA <-> OJC
+CRR <-> HVH
+JBW <-> SBK
+YPS <-> WKI
+XET <-> OJC
+LWO <-> YUJ
+SZW <-> SBK
+CRR <-> YPS
+SZW <-> VMV
+WFG <-> WKI
+WTO <-> STT
+VJZ <-> YUJ
+WTO <-> HVH
+STT <-> EIH
+LWO <-> XBA
+JJF <-> COE
+HNX <-> SBK
+MJB <-> ASU
+XET <-> DZV
+VBJ <-> CRR
+XET <-> YHP
+VBJ <-> JBW
+HSM <-> IEK
+QMZ <-> YUJ
+IHW <-> COE
+CRR <-> XBA
+KIQ <-> ASU
+HVQ <-> XBA
+WKI <-> IHW
+SCD <-> FWI
+EIH <-> QRH
+HSM <-> CQA
+TAZ <-> WTO
+HTO <-> FWI
+PGM <-> OJC
+TAZ <-> FWI
+HVQ <-> CQA
+JXH <-> IEK
+PGM <-> SEV
\ No newline at end of file
diff --git a/main.py b/main.py
deleted file mode 100644
index c02586c..0000000
--- a/main.py
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/usr/bin/env python3
-
-import tools.aoc
-import argparse
-import importlib
-import os
-
-YEAR = 2018
-TIMEIT_NUMBER = 50
-
-argument_parser = argparse.ArgumentParser()
-argument_parser.add_argument("-d", "--day", help="specify day to process; leave empty for ALL days", type=int)
-argument_parser.add_argument("-p", "--part", help="run only part x", choices=[1, 2], type=int)
-argument_parser.add_argument("--timeit", help="measure execution time", action="store_true", default=False)
-argument_parser.add_argument(
-    "--timeit-number",
-    help="build average time over this many executions",
-    type=int,
-    default=TIMEIT_NUMBER
-)
-argument_parser.add_argument("-v", "--verbose", help="show test case outputs", action="store_true", default=False)
-flags = argument_parser.parse_args()
-
-import_day = ""
-if flags.day:
-    import_day = "%02d" % flags.day
-
-imported = []
-for _, _, files in os.walk(tools.aoc.BASE_PATH):
-    for f in files:
-        if f.startswith('day' + import_day) and f.endswith('.py'):
-            lib_name = f[:-3]
-            globals()[lib_name] = importlib.import_module(lib_name)
-            imported.append(lib_name)
-
-    break
-
-for lib in sorted(imported):
-    day = int(lib[-2:])
-    day_class = getattr(globals()[lib], "Day")(YEAR, day)
-    day_class.run(flags.part if flags.part else 3, flags.verbose, flags.timeit, flags.timeit_number)
diff --git a/problem1.py b/problem1.py
new file mode 100644
index 0000000..5de8d41
--- /dev/null
+++ b/problem1.py
@@ -0,0 +1,17 @@
+my_input = list(map(int, open("inputs/input_1", "r").readlines()))
+
+p1 = sum(my_input)
+p2 = sum(sorted(my_input)[:-20])
+
+
+p3 = 0
+rev = False
+for x in my_input:
+    if rev: x = -x
+    p3 += x
+    rev = not rev
+
+
+print(p1)
+print(p2)
+print(p3)
diff --git a/problem2.py b/problem2.py
new file mode 100644
index 0000000..2e5b0d8
--- /dev/null
+++ b/problem2.py
@@ -0,0 +1,38 @@
+my_input = open("inputs/input_2", "r").read().split("\n")
+my_input = list(map(lambda x: True if x == "TRUE" else False, my_input))
+
+p1 = 0
+for i, x in enumerate(my_input):
+    if x:
+        p1 += (i + 1)
+
+
+def solve_gates(inputs: list[bool]) -> list[bool]:
+    result_gates = []
+    is_or = False
+    for i in range(0, len(inputs), 2):
+        if is_or:
+            if my_input[i] or my_input[i + 1]:
+                result_gates.append(True)
+            else:
+                result_gates.append(False)
+        else:
+            if my_input[i] and my_input[i + 1]:
+                result_gates.append(True)
+            else:
+                result_gates.append(False)
+
+        is_or = not is_or
+
+    return result_gates
+
+
+p2 = sum(solve_gates(my_input))
+p3 = sum(my_input)
+while len(my_input) > 1:
+    my_input = solve_gates(my_input)
+    p3 += sum(my_input)
+
+print(p1)
+print(p2)
+print(p3)
diff --git a/problem3.py b/problem3.py
new file mode 100644
index 0000000..be32548
--- /dev/null
+++ b/problem3.py
@@ -0,0 +1,24 @@
+my_input = open("inputs/input_3", "r").read().split("\n")
+
+p1 = 0
+read_sum = 0
+for line in my_input:
+    number, base = line.split()
+    base = int(base)
+    number = int(number, base)
+    p1 += base
+    read_sum += number
+
+p2 = read_sum
+
+p3 = ""
+b65chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!@#"
+while read_sum > 64:
+    rem = read_sum % 65
+    read_sum = read_sum // 65
+    p3 = b65chars[rem] + p3
+p3 = b65chars[read_sum] + p3
+
+print(p1)
+print(p2)
+print(p3)
diff --git a/problem4.py b/problem4.py
new file mode 100644
index 0000000..5c76426
--- /dev/null
+++ b/problem4.py
@@ -0,0 +1,43 @@
+from collections import deque
+
+my_input = open("inputs/input_4", "r").read().split("\n")
+start = "STT"
+
+
+class City:
+    def __init__(self, name):
+        self.name = name
+        self.connects = set()
+
+cities = {}
+for line in my_input:
+    city_left, city_right = line.split(" <-> ")
+    if city_left not in cities:
+        cities[city_left] = City(city_left)
+    if city_right not in cities:
+        cities[city_right] = City(city_right)
+
+    cities[city_left].connects.add(cities[city_right])
+    cities[city_right].connects.add(cities[city_left])
+
+p1 = len(cities)
+p2 = 0
+p3 = 0
+q = deque([(0, cities[start])])
+seen = set()
+while q:
+    dist, city = q.popleft()
+    if city in seen:
+        continue
+    seen.add(city)
+
+    p3 += dist
+    if dist <= 3:
+        p2 += 1
+
+    for sub_city in city.connects:
+        q.append((dist + 1, sub_city))
+
+print(p1)
+print(p2)
+print(p3)
diff --git a/skel_day.py b/skel_day.py
deleted file mode 100644
index bf3331b..0000000
--- a/skel_day.py
+++ /dev/null
@@ -1,24 +0,0 @@
-from tools.aoc import AOCDay
-from typing import Any
-
-
-class Day(AOCDay):
-    inputs = [
-        [
-            (None, "input%DAY%"),
-        ],
-        [
-            (None, "input%DAY%"),
-        ]
-    ]
-
-    def part1(self) -> Any:
-        return ""
-
-    def part2(self) -> Any:
-        return ""
-
-
-if __name__ == '__main__':
-    day = Day(%YEAR%, %DAY%)
-    day.run(verbose=True)
diff --git a/start_day.py b/start_day.py
deleted file mode 100644
index 8f8da4c..0000000
--- a/start_day.py
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env python3
-from argparse import ArgumentParser
-from datetime import datetime
-from os.path import exists
-from platform import system
-from subprocess import call
-from time import sleep
-from tools.tools import human_readable_time_from_delta
-import webbrowser
-
-
-YEAR = 2018
-CHARMS = {
-    'Linux': '/usr/local/bin/charm',
-    'Windows': r'C:\Users\pennywise\AppData\Local\JetBrains\Toolbox\scripts\pycharm.cmd'
-}
-
-arg_parser = ArgumentParser()
-arg_parser.add_argument("-d", "--day", help="start a specific day (default: today)", type=int)
-args = arg_parser.parse_args()
-
-DAY = args.day or datetime.now().day
-
-if YEAR < 2015 or not 1 <= DAY <= 25:
-    print("Invalid year or day for year: %d, day: %d" % (YEAR, DAY))
-    exit()
-
-day_file = "day%02d.py" % DAY
-if exists(day_file):
-    print(day_file, "already exists. Use that one!")
-    exit()
-
-start = datetime(YEAR, 12, DAY, 6, 0, 0)
-now = datetime.now()
-if start > now:
-    time_wait = start - now
-    if time_wait.days > 0:
-        print("Do you really want to wait %d days?" % time_wait.days)
-        exit()
-
-    while time_wait.seconds > 0:
-        print("Day %d starts in %s.\r" % (DAY, human_readable_time_from_delta(time_wait)))
-        if time_wait.seconds > 70:
-            wait = min(1, time_wait.seconds // 3600) * 3600 + min(1, time_wait.seconds // 60) * 60
-            sleep(wait)
-        else:
-            sleep(1)
-        time_wait = start - datetime.now()
-
-
-with open("skel_day.py", "r") as IN:
-    with open(day_file, "w") as OUT:
-        while in_line := IN.readline():
-            OUT.write(in_line.replace("%YEAR%", str(YEAR)).replace("%DAY%", str(DAY)))
-
-call(["git", "add", day_file])
-webbrowser.open("https://adventofcode.com/%d/day/%d" % (YEAR, DAY))
-call([CHARMS[system()], day_file])