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levieProekti/Olymp2020/gorodolymp2tour14,12,2020/15++.py

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+import copy
+import itertools
+max = 0
+ostatki = []
+n = int(input())
+chisla = map(int, input().split())
+oldallresults = []
+somechisl = ""
+for i in range(1, n + 1):
+    newlist = copy.deepcopy(chisla)
+    result = itertools.combinations(newlist, i)
+    oldallresults.extend(result)
+
+for i in range(len(oldallresults)):
+    for j in oldallresults[i]:
+        somechisl = str(somechisl) + str(j)
+    intsomechisl = int(somechisl)
+    if intsomechisl % 15 == 0 and intsomechisl > max:
+        max = intsomechisl
+    somechisl = ""
+
+if max != 0:
+    print(max)
+else:
+    print("Impossible")