diff --git a/day17/day17.py b/day17/day17.py
index 89caaf8..e205dac 100644
--- a/day17/day17.py
+++ b/day17/day17.py
@@ -1,6 +1,74 @@
+import copy
+
+
+def count(box):
+    count = 0
+    size = len(box)
+    for x in range(0, size):
+        for y in range(0, size):
+            for z in range(0, size):
+                if box[z][x][y] == '#':
+                    count += 1
+
+    return count
+
+
+def simulate(box):
+    size = len(box)
+    forbidden = [-1, size]
+
+    next_box = [[['' for _ in range(size)] for _ in range(size)] for _ in range(size)]
+
+    for z in range(0, size):
+        for x in range(0, size):
+            for y in range(0, size):
+
+                xs = [a for a in [x - 1, x, x + 1] if a not in forbidden]
+                ys = [a for a in [y - 1, y, y + 1] if a not in forbidden]
+                zs = [a for a in [z - 1, z, z + 1] if a not in forbidden]
+
+                count = 0
+
+                for xn in xs:
+                    for yn in ys:
+                        for zn in zs:
+                            if box[zn][xn][yn] == '#':
+                                count += 1
+
+                if box[z][x][y] == '#':
+                    if 2 == count or 3 == count:
+                        next_box[z][x][y] = '#'
+                    else:
+                        next_box[z][x][y] = '.'
+                elif box[z][x][y] == '.':
+                    if count == 3:
+                        next_box[z][x][y] = '#'
+                    else:
+                        next_box[z][x][y] = '.'
+
+    return next_box
+
+
 def part1():
-    file = open("../day3/input.txt")
-    print(f"Part 1:")
+    file = open("../day17/input_test.txt")
+
+    lines = [line.strip() for line in file.readlines()]
+
+    simulations = 6
+    size = len(lines) + (2 * simulations)
+
+    box = [[['.' for _ in range(size)] for _ in range(size)] for _ in range(size)]
+
+    for x in range(0, len(lines)):
+        for y in range(0, len(lines)):
+            box[0 + simulations][x + simulations][y + simulations] = lines[x][y]
+            box[1 + simulations][x + simulations][y + simulations] = lines[x][y]
+            box[2 + simulations][x + simulations][y + simulations] = lines[x][y]
+
+    for i in range(0, simulations):
+        box = simulate(box)
+
+    print(f"Part 1: {count(box)}")
 
 
 def part2():
diff --git a/day17/input.txt b/day17/input.txt
index e69de29..d7c4386 100644
--- a/day17/input.txt
+++ b/day17/input.txt
@@ -0,0 +1,8 @@
+####.#..
+.......#
+#..#####
+.....##.
+##...###
+#..#.#.#
+.##...#.
+#...##..
diff --git a/day18/day18.py b/day18/day18.py
index 89caaf8..3d062cc 100644
--- a/day18/day18.py
+++ b/day18/day18.py
@@ -1,6 +1,42 @@
+import numpy as np
+
+def solve(index, line):
+    val = 0
+
+    while index < len(line):
+
+        print(index)
+
+        if line[index] == '(':
+            val += solve(index + 1, line)
+        elif line[index] == ')':
+            return val
+
+        elif line[index] == '+':
+            if line[index + 1] == '(':
+                val += solve(index + 2, line)
+            else:
+                val += int(line[index + 1])
+        elif line[index] == '*':
+            val *= solve(index + 1, line)
+
+        else:
+            val += line[index]
+
+        index += 1
+
+    return val
+
+
 def part1():
-    file = open("../day3/input.txt")
-    print(f"Part 1:")
+    file = open("input_test.txt")
+    lines = [line.strip() for line in file.readlines()]
+
+    sum = 0
+    for line in lines:
+        sum += solve(0, line.split(' '))
+
+    print(f"Part 1: {sum}")
 
 
 def part2():
diff --git a/main.py b/main.py
deleted file mode 100644
index e69de29..0000000