14 lines
216 B
Python
14 lines
216 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('''4
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2 6 4 1''') # 7
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n = int(input())
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a = list(map(int, input().split()))
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dp0, dp1 = 0, a[0]
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for i in range(1, n):
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dp0, dp1 = dp1, max(dp1, dp0 + a[i])
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print(dp1)
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