Day 3 2025

2 files changed, 32 insertions, 2 deletions

diff --git a/2025/03/a.py b/2025/03/a.py
index 5fdb11b..9f4db62 100644
--- a/2025/03/a.py
+++ b/2025/03/a.py
@@ -1,6 +1,18 @@
 import fileinput
 
+s = 0
 with fileinput.input() as lines:
         for line in lines:
-                ...
-
+                m1 = 0
+                m2 = 0
+                mi = -1
+                for i in range(len(line)-2):
+                        if int(line[i]) > m1:
+                                m1 = int(line[i])
+                                mi = i
+                for i in range(mi+1, len(line)-1):
+                        if int(line[i]) > m2:
+                                m2 = int(line[i])
+                print(10*m1+m2)
+                s += 10*m1+m2
+print(s)
diff --git a/2025/03/b.py b/2025/03/b.py
new file mode 100644
index 0000000..4c74ae6
--- /dev/null
+++ b/2025/03/b.py
@@ -0,0 +1,18 @@
+import fileinput
+from functools import cache
+
+neginf = -1e13
+
+@cache
+def joltage(line, n):
+        if n == 0:
+                return 0
+        if n > len(line)-1:
+                return neginf
+        j = 0
+        for i in range(len(line)-1):
+                j = max(j, int(line[i])*10**(n-1)+joltage(line[i+1:],n-1))
+        return j
+
+with fileinput.input() as lines:
+        print(sum(joltage(line, 12) for line in lines))