Solve 2016 days 2 and 3.

2016/d2.py

@@ -0,0 +1,34 @@
+from lib import *
+
+second = True
+
+if second is False:
+    keypad = "123\n456\n789".splitlines()
+else:
+    keypad = "00100\n02340\n56789\n0ABC0\n00D00".splitlines()
+
+data = open(0).read()
+
+DIRS = {
+    "D": (1, 0),
+    "L": (0, -1),
+    "R": (0, 1),
+    "U": (-1, 0),
+}
+
+BOUND = len(keypad) - 1
+pos = (2, 0)
+r = ""
+for row in data.splitlines():
+    for c in row:
+        dir = DIRS[c]
+        npos = pos[0] + dir[0], pos[1] + dir[1]
+        if npos[0] >= 0 and npos[0] <= BOUND and npos[1] >= 0 and npos[1] <= BOUND:
+            if keypad[npos[0]][npos[1]] != "0":
+                pos = npos
+    r += keypad[pos[0]][pos[1]]
+
+print(r)
+
+
+

2016/d3.py

@@ -0,0 +1,21 @@
+from lib import *
+
+second = True
+data = open(0).read()
+
+res = 0
+if not second:
+    for row in data.splitlines():
+        a, b, c = list(map(int, row.split()))
+        if a + b > c and a + c > b and b + c > a:
+            res += 1
+else:
+    rows = list(map(lambda row: row.split(), data.splitlines()))
+    for coli in range(len(rows[0])):
+        for rowi in range(0, len(rows), 3):
+            a = int(rows[rowi][coli])
+            b = int(rows[rowi + 1][coli])
+            c = int(rows[rowi + 2][coli])
+            if a + b > c and a + c > b and b + c > a:
+                res += 1
+print(res)

README.md

@@ -28,7 +28,12 @@ written in Python.
 - Day 21: 25:52 cute bug where I didn't consider that no armor is an option
 - Day 22: That was bad. Did not know how to choose between dfs/bfs and logic errors.
 - Day 23: 
+- Day 24: 
+- Day 25: 
 
 # 2016
 
 - Day 1: 29:00 That was emberassingly slow. Out of my rhythm?
+- Day 2: 13:24 Getting back into it but still slow af, obviously.
+- Day 3: 11:20 Ugly and slow.
+- Day 4: