Completed day 9

09/part1

@@ -0,0 +1,16 @@
+#!/usr/bin/python3
+
+code = []
+with open("input") as fh:
+    for ln in fh:
+        code.append(int(ln))
+
+def valid(code, o):
+    for i in range(o - 25, o - 1):
+        for j in range(i, o):
+            if code[i] + code[j] == code[o]:
+                return True
+
+for o in range(25, len(code)):
+    if not valid(code, o):
+        print(o, code[o])

09/part2

@@ -0,0 +1,29 @@
+#!/usr/bin/python3
+import sys
+
+code = []
+with open("input") as fh:
+    for ln in fh:
+        code.append(int(ln))
+
+def valid(code, o):
+    for i in range(o - 25, o - 1):
+        for j in range(i, o):
+            if code[i] + code[j] == code[o]:
+                return True
+
+for o in range(25, len(code)):
+    if not valid(code, o):
+        target = code[o]
+        break
+
+for i in range(len(code)):
+    for j in range(i + 1, len(code)):
+        s = sum(code[i:j+1])
+        if s == target:
+            smallest = min(code[i:j+1])
+            largest = max(code[i:j+1])
+            print(smallest + largest)
+            sys.exit(0)
+        elif s > target:
+            break # adding more numbers won't help

10/input

@@ -0,0 +1,94 @@
+138
+3
+108
+64
+92
+112
+44
+53
+27
+20
+23
+77
+119
+62
+121
+11
+2
+37
+148
+34
+83
+24
+10
+79
+96
+98
+127
+7
+115
+19
+16
+78
+133
+61
+82
+91
+145
+39
+33
+13
+97
+55
+141
+1
+134
+40
+71
+54
+103
+101
+26
+47
+90
+72
+126
+124
+110
+131
+58
+12
+142
+105
+63
+75
+50
+95
+69
+25
+68
+144
+86
+132
+89
+128
+135
+65
+125
+76
+116
+32
+18
+6
+38
+109
+111
+30
+70
+143
+104
+102
+120
+31
+41
+17

10/part2

@@ -0,0 +1,26 @@
+#!/usr/bin/python3
+
+from functools import lru_cache
+
+adapters = []
+with open("input") as fh:
+    for ln in fh:
+        adapters.append(int(ln))
+
+adapters = sorted(adapters)
+
+@lru_cache(maxsize=None)
+def count(start, offset):
+    if offset == len(adapters) - 1:
+        return 1
+    n = 0
+    for i in range(offset, len(adapters)):
+        if adapters[i] - start < 1:
+            raise RuntimeError()
+        elif adapters[i] - start <= 3:
+            n += count(adapters[i], i+1)
+        else:
+            break
+    return n
+
+print(count(0, 0))