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--- treffen:problemsolving:008_set [2021/12/17 13:06]
max angelegt
+++ treffen:problemsolving:008_set [2022/01/22 14:38] (aktuell)
max
@@ Zeile 1: / Zeile 1: @@
-====== 008 Problem Solving: Set ======
+{{:treffen:problemsolving:setwithfriends.png?400|}}
-Published: Dec 15th 2021
-{{ :treffen:problemsolving:008_problemsolving_set.pdf |Download [pdf]}}
+====== 008: Set ======
+| Serie | [[treffen:problemsolving|treffen:problemsolving]] |
+| Von | [[user:nopx|nopx]] |
+| Datum | 15.Dez 2021 |
+| Download | {{ :treffen:problemsolving:008_problemsolving_set.pdf |Aufgabenbeschreibung [pdf]}} |
+| Schwierigkeit | {{:treffen:problemsolving:progress1.png?nolink&160 |}} |
+===== Lösungen =====
+{{:treffen:problemsolving:spoileralert.png?200|}}
+----
+==== nopx ====
+Stupide Brute Force Loesung in Python 3.8 hier zusammengefasst. Ausfuehrlicher Code kann {{ :treffen:problemsolving:008_problemsolving_set_solution_max_v0.2.zip |hier}} runtergeladen werden.
+<code Python>
+import sys
+import numpy as np
+import itertools
+num_properties = 4
+setsize = 3
+def solve_set(instr : str) -> list:
+    assert(len(instr) % num_properties == 0)
+    num_cards = len(instr) // num_properties
+    cards = np.zeros( ( num_cards, num_properties), dtype=int)
+    for i in range(0,len(instr),num_properties):
+        for j in range(num_properties):
+            cards[i//num_properties,j] = ord(instr[i+j])
+    idxs_cards = list(range(len(cards)))
+    solutions = []
+    for perm in itertools.permutations(idxs_cards,setsize):
+        for prop_id in range(num_properties):
+            l = cards[perm,prop_id]
+            unique = np.unique(l)
+            if len(unique) != 1 and len(unique) < setsize:
+                break
+            else:
+                if prop_id == num_properties-1:
+                    solutions.append(perm)
+    return solutions, cards
+if __name__ == "__main__":
+    instr = str(sys.argv[1])
+    if len(instr) < num_properties:
+        exit(1)
+    solutions, cards = solve_set(instr)
+    if len(solutions) > 0:
+        exit(0)
+    else:
+        exit(1)
+</code>
+~~DISCUSSION~~