45 lines
922 B
Python
45 lines
922 B
Python
with open("8.txt") as f:
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ins = []
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for line in f:
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ins.append(line.strip())
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def term(ins):
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f = set()
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f2 = set()
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acc = 0
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ip = 0
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while True:
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if ip >= len(ins):
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break
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i = ins[ip]
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if ip in f:
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if ip in f2:
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return None
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f2.add(ip)
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f.add(ip)
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# print(ip, i)
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c, v = i.split(" ")
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v = int(v)
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if c == "acc":
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acc += v
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elif c == "jmp":
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ip = ip + v - 1
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ip += 1
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return acc
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for i in range(len(ins)):
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l = ins[i]
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if not (l.startswith("jmp") or l.startswith("nop")): continue
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orig = l
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if l.startswith("jmp"):
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new = l.replace("jmp", "nop")
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elif l.startswith("nop"):
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new = l.replace("nop", "jmp")
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ins[i] = new
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r = term(ins)
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if r is None:
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ins[i] = orig
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else:
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print(r)
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break
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