9 lines
167 B
Python
9 lines
167 B
Python
last1 = 1
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last2 = 2
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res = 2
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while last1 + last2 <= 4000000:
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new = last1 + last2
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res += new if new % 2 == 0 else 0
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last1 = last2
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last2 = new
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print(res)
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