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Add crossings exercise

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lolabird 2023-12-21 04:24:56 -07:00
commit fb04488532
1 changed files with 34 additions and 0 deletions
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thinkcspy/Chapter-16-Exercises/crossings.py Normal file
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def cross(bank1, boat, bank2):
if bank1["Missionaries"] + bank1["Cannibals"] == 0 and boat["Missionaries"] + boat["Cannibals"] == 0:
return "Journey complete"
elif bank1["Missionaries"] + bank1["Cannibals"] > 0 and boat["Missionaries"] + boat["Cannibals"] < 2:
if bank1["Missionaries"] - 1 >= bank1["Cannibals"]:
bank1["Missionaries"] -= 1
boat["Missionaries"] += 1
print(bank1, boat, bank2)
elif bank1["Cannibals"] > 0:
bank1["Cannibals"] -= 1
boat["Cannibals"] += 1
print(bank1, boat, bank2)
else:
if boat["Cannibals"] >= 1 and bank2["Missionaries"] >= bank2["Cannibals"] + 1:
bank2["Cannibals"] += 1
boat["Cannibals"] -= 1
elif boat["Missionaries"] >= 1:
bank2["Missionaries"] += 1
boat["Missionaries"] -= 1
print(bank1, boat, bank2)
cross(bank1, boat, bank2)
def main():
bank1 = {"name": "B1", "Missionaries": 3, "Cannibals": 3}
bank2 = {"name": "B2", "Missionaries": 0, "Cannibals": 0}
boat = {"name": "boat", "Missionaries": 0, "Cannibals": 0}
return cross(bank1, boat, bank2)
print(main())