12 lines
221 B
Python
12 lines
221 B
Python
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n=int(input())
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one_num=1
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two_num=1
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for i in range(3,n+1):
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new_num=one_num+two_num
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two_num=one_num
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if new_num>1000000007:
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one_num=new_num%(1000000007)
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else:
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one_num = new_num
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print(one_num)
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