diff --git a/18/24.py b/18/24.py
new file mode 100644
index 0000000..e10e692
--- /dev/null
+++ b/18/24.py
@@ -0,0 +1,26 @@
+inf = float('inf')
+
+
+def count(a: list[list[int]], i: int, j: int) -> list[int]:
+  if a[i][j] > 100 and a[i][j] < 500 or a[i][j] < 0 and a[i][j] > -400:
+    return [0, inf]
+
+  t, l = [0, inf], [0, inf]
+  summ = a[i][j]
+
+  if i > 0:
+    t = count(a, i-1, j)
+  if j > 0:
+    l = count(a, i, j-1)
+
+  # minn = min(t[1], l[1])
+
+  return [summ + max(t[0], l[0]), summ + min(t[1], l[1])]
+
+
+with open("dat/18-13.csv", 'r') as f:
+  a = [[int(i) for i in row.split(';')] for row in f.readlines()]
+
+  print(count(a, len(a) - 1, len(a[0]) - 1))
+
+# 1535
diff --git a/18/40.py b/18/40.py
new file mode 100644
index 0000000..676fb38
--- /dev/null
+++ b/18/40.py
@@ -0,0 +1,14 @@
+with open('dat/18-k1.csv', "r") as f:
+  k = 0
+  m = 0
+  for i in f.readlines():
+    if int(i) % 2 == 1:
+      k += 1
+    else:
+      if k > m:
+        m = k
+      k = 0
+
+  print(m)
+
+# 5
\ No newline at end of file
diff --git a/18/44.py b/18/44.py
new file mode 100644
index 0000000..6f6155a
--- /dev/null
+++ b/18/44.py
@@ -0,0 +1,11 @@
+a = [int(i) for i in open('dat/18-k3.csv', 'r')]
+
+k = 0
+for i in range(len(a) - 5):
+  for j in range(1, 6):
+    if a[i] + a[j] < 100:
+      k += 1
+
+print(k)
+
+# 15
diff --git a/18/69.py b/18/69.py
new file mode 100644
index 0000000..46dcfb2
--- /dev/null
+++ b/18/69.py
@@ -0,0 +1,25 @@
+def count(a, i, j):
+  if i == -1 or j == -1:
+    return None
+
+  l = count(a, i, j-1)
+  t = count(a, i-1, j)
+  c = a[i][j] // 8
+
+  if l == None and t == None:
+    return [c, c]
+  if l == None:
+    return [c + t[0], c + t[1]]
+  if t == None:
+    return [c + l[0], c + l[1]]
+
+  return [c + max(t[0], l[0]), c + min(t[1], l[1])]
+
+
+a = [[int(i) for i in row.split(';')] for row in open('dat/18-2.csv', 'r')]
+
+res = count(a, len(a)-1, len(a[0])-1)
+
+print(res[0] * 8, res[1] * 8)
+
+# 1256 472
diff --git a/18/73.py b/18/73.py
new file mode 100644
index 0000000..ea49e00
--- /dev/null
+++ b/18/73.py
@@ -0,0 +1,29 @@
+def count(a, i, j):
+  if i == len(a)-1:
+    return [a[i][j], a[i][j]]
+
+  M, m = count(a, i+1, j)
+
+  res1, res2 = [M, m], [M, m]
+
+  if j > 0:
+    res1 = count(a, i+1, j-1)
+
+  if j < len(a[0])-1:
+    res2 = count(a, i+1, j+1)
+
+  return a[i][j] + max(M, res1[0], res2[0]), a[i][j] + min(m, res1[1], res2[1])
+
+
+a = [[int(i) for i in row.split(';')] for row in open('dat/18-0.csv', 'r')]
+
+M, m = 0, float('inf')
+
+for i in range(len(a[0])):
+  res = count(a, 0, i)
+  M = max(M, res[0])
+  m = min(m, res[1])
+
+print(M, m)
+
+# 811 201
diff --git a/18/74.py b/18/74.py
new file mode 100644
index 0000000..be67d8a
--- /dev/null
+++ b/18/74.py
@@ -0,0 +1,29 @@
+def count(a, i, j):
+  if j == len(a[0])-1:
+    return [a[i][j], a[i][j]]
+
+  M, m = count(a, i, j+1)
+
+  res1, res2 = [M, m], [M, m]
+
+  if i > 0:
+    res1 = count(a, i-1, j+1)
+
+  if i < len(a)-1:
+    res2 = count(a, i+1, j+1)
+
+  return a[i][j] + max(M, res1[0], res2[0]), a[i][j] + min(m, res1[1], res2[1])
+
+
+a = [[int(i) for i in row.split(';')] for row in open('dat/18-0.csv', 'r')]
+
+M, m = 0, float('inf')
+
+for i in range(len(a)):
+  res = count(a, i, 0)
+  M = max(M, res[0])
+  m = min(m, res[1])
+
+print(M, m)
+
+# 785 176