8

8.py

@@ -0,0 +1,96 @@
+import numpy as np
+from pprint import pprint
+import sys
+
+from numpy.lib.function_base import delete
+
+EASY_LENGTHS = np.array([2, 4, 3, 7])
+
+vec_len = np.vectorize(len)
+
+
+def part_one(lines):
+
+    total = 0
+
+    for line in lines:
+        digits, output_str = line.split("|")
+        digits = digits.split()
+        output_value: np.ndarray = output_str.split()
+        lengths: np.ndarray = vec_len(output_value)
+        for length in lengths:
+            if length in EASY_LENGTHS:
+                total += 1
+
+    return total
+
+
+def part_two(lines):
+    total = 0
+
+    for line in lines:
+        digits, output_str = line.split("|")
+        digits = np.array([frozenset(list(x)) for x in digits.split()])
+
+        output_value: np.ndarray = np.array(
+            [frozenset(list(x)) for x in output_str.split()]
+        )
+
+        lengths: np.ndarray = vec_len(digits)
+
+        mapping = {}
+
+        # Get easy mappings
+        mapping[1] = digits[lengths == 2][0]
+        mapping[4] = digits[lengths == 4][0]
+        mapping[7] = digits[lengths == 3][0]
+        mapping[8] = digits[lengths == 7][0]
+
+        digits = digits[digits != mapping[1]]
+        digits = digits[digits != mapping[4]]
+        digits = digits[digits != mapping[7]]
+        digits = digits[digits != mapping[8]]
+        lengths: np.ndarray = vec_len(digits)
+
+        # 3: length 5, superset of 7
+        mapping[3] = digits[(lengths == 5) & (mapping[7] <= digits)][0]
+        digits = digits[digits != mapping[3]]
+        lengths: np.ndarray = vec_len(digits)
+
+        # 5: length 5, 3 parts of 4
+        digits_5 = digits[lengths == 5]
+        mapping[5] = digits_5[vec_len(digits_5 & mapping[4]) == 3][0]
+        digits = digits[digits != mapping[5]]
+        lengths: np.ndarray = vec_len(digits)
+
+        # 2: Remaining length 5
+        mapping[2] = digits[lengths == 5][0]
+        digits = digits[digits != mapping[2]]
+        del lengths  # make sure the invalid list isn't used anymore
+
+        # -- Only length 6 left
+
+        # 9: superset of 4
+        mapping[9] = digits[mapping[4] <= digits][0]
+        digits = digits[digits != mapping[9]]
+
+        # 0: superset of 7
+        mapping[0] = digits[mapping[7] <= digits][0]
+        digits = digits[digits != mapping[0]]
+
+        assert len(digits) == 1
+
+        # 6: remaining
+        mapping[6] = digits[0]
+
+        decode_mapping = {v: str(k) for k, v in mapping.items()}
+
+        total += int("".join([decode_mapping[x] for x in output_value]))
+
+    return total
+
+
+if __name__ == "__main__":
+    lines = sys.stdin.readlines()
+    print("Part one:", part_one(lines))
+    print("Part two:", part_two(lines))

ex8.in

@@ -0,0 +1,10 @@
+be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb | fdgacbe cefdb cefbgd gcbe
+edbfga begcd cbg gc gcadebf fbgde acbgfd abcde gfcbed gfec | fcgedb cgb dgebacf gc
+fgaebd cg bdaec gdafb agbcfd gdcbef bgcad gfac gcb cdgabef | cg cg fdcagb cbg
+fbegcd cbd adcefb dageb afcb bc aefdc ecdab fgdeca fcdbega | efabcd cedba gadfec cb
+aecbfdg fbg gf bafeg dbefa fcge gcbea fcaegb dgceab fcbdga | gecf egdcabf bgf bfgea
+fgeab ca afcebg bdacfeg cfaedg gcfdb baec bfadeg bafgc acf | gebdcfa ecba ca fadegcb
+dbcfg fgd bdegcaf fgec aegbdf ecdfab fbedc dacgb gdcebf gf | cefg dcbef fcge gbcadfe
+bdfegc cbegaf gecbf dfcage bdacg ed bedf ced adcbefg gebcd | ed bcgafe cdgba cbgef
+egadfb cdbfeg cegd fecab cgb gbdefca cg fgcdab egfdb bfceg | gbdfcae bgc cg cgb
+gcafb gcf dcaebfg ecagb gf abcdeg gaef cafbge fdbac fegbdc | fgae cfgab fg bagce

input8.in

@@ -0,0 +1,200 @@
+fcdeba edcbag decab adcefg acdfb gdcfb acf fabe fa eacfgbd | aefb cfa acf cdabf
+adbec fabeg fgda gafedb fadeb cdebgf cfaebdg fd bdf cgfbae | ebdfga fbd bdagcef dfb
+cagefd fegabc gbde fcagebd bcedf gefcd bec cefbdg dfabc eb | gdeb dgbe defcb ebc
+cegbf acfeb cafde ab abfecd ecagfd edbcga adbf ecfadgb abc | degafc gefbc ab adcef
+bc gdeca bec fcab cegfdb edbgcfa gbefda fedba dceba badecf | fdbeacg dgbaef bec cbe
+caebdg gfc gaceb adcbf bgfac gf eafg dfbegc abfcge ebdcgaf | bcfag bdgface fegcba gdbeca
+fedga fgebdc dfb edcagb edcab afbc fdecba dbaef fb aefbgcd | bf bcade bf cafb
+cb cfgea badcge gdfabce bec fedbg egdafb cgdfbe cdfb cbgef | dbfc gecbfd fbdc ceb
+cbfdag fcbgd afbgced cgfab ebfgad agcbef dfg fecdb dcga gd | gacfedb cbfgd dgf gdfbc
+abgfd dgcbe dfbgce acbged eab ae daebg edac gdbfcae cgbeaf | bcedg eba eab edac
+gea ag cfaeg agcd befagd fcdae adcgfe ecbgafd cdbfea gefbc | bdeafc defacg gae dgcaef
+bfeca adfbce febd beagc cdeafg fgacedb efc dcbagf abcdf fe | agedfc cefba ef fgcbeda
+cbeafd gfabd dabecg cfeg dfc gcadf cgaed efacgdb cf gfcdae | cefg fgdca decagfb ebfadc
+fg edabf gbedf gedbfa ebafcg egbdacf fgad cedgb cdebfa egf | bgdec egdfab gf acfgbe
+cfe bacge ecfabd dcbfega defa cdfba defbcg fe feabc dbfcag | cabge ef fadbc eafd
+ag gadb edacfb gcaefd eafbd dbeafg efcgdba fag egcbf gfbea | agf gbfcdea cbaefd ag
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+dbcega beg gb cfdeba gaceb gfeca gdab fcedbg beacd cfagedb | cfbgade bg bg fdgcbe
+abdcgf agebc dacbg fbadce fcaged gd fdcebga cfdab gbdf dag | gd cefgdba dgbf fbdg
+gb ecbadf gbad edfgcb bgf dbcaf afbcg cgfea cdfgbae dcfbag | gb bg bgfceda dafcbe
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+da afd gfebdc cadg deafc ecfdg gdafbec fagcde edbafg eabfc | aefbdg ad fcdge dgbfce
+ecgdaf df dbeac fbegc cdf bfedc bacgde dfaecb dbfa bfgdace | defcag bcfed fedcb begcf
+ceafbd ecfgbad afgdbe gbdac fcgbed ebg eg gfae egadb baedf | ge eg gafedb bge
+bf abcdfe afb acdbf fdaebg cdgabe cbfe cdbea dgaefcb gfcad | cagedbf acefdbg febadgc edbac
+aegcdf abgecf abefdgc daefg agbfd eacgd cgeadb decf fe gfe | fe gcafedb fe bdcgea
+be cgfdea bfce fbegd bagefdc bge gbfda fedgc ecdabg bdefgc | begdf dgaefbc bge edbcfg
+facebgd fcge caf agbecf dbafg aegcb dcabeg bagfc fc fcadeb | cf caf fc ecafbg
+fbegca bfegad cafe caegb beagf gfcdab ca cdegb bfdegca cag | fgaeb agc ecfa bfaeg
+ab fceadgb bae gceda afbced gfdeb edbafg fdbecg aebgd bfga | ba ebfdca gfedb dagbe
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+beafdc bgdec efgbac gab gdbcaf ebcga gfea ga cagebfd fcabe | gba cbega gaef eabcfdg
+de fdcegb fcebd afegbc efd bdcfa decgbaf gfecb gefdac dbge | gedb edf gbfec ed
+dbfacge eabdg beg adbcg eg abdfe fbadeg adcbef bfecdg gaef | bedfga bdfae dafcbe beg
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singleline8.in

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