22 lines
363 B
Python
22 lines
363 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('''5
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7
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3 8
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8 1 0
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2 7 4 4
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4 5 2 6 5''')
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n = int(input())
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nums = []
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for i in range(n):
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nums.append(list(map(int, input().split())))
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f = [[0] * (n + 1) for _ in range(n + 1)]
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for i in range(n - 1, -1, -1):
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for j in range(i + 1):
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f[i][j] = max(f[i + 1][j], f[i + 1][j + 1]) + nums[i][j]
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print(f[0][0])
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