문제1404--Cow Bowling

1404: Cow Bowling

실행시간 제한: 1 Sec  메모리사용 제한: 64 MB
제출: 81  통과: 57
[제출] [채점기록] [묻고답하기]

문제 설명

The cows don't use actual bowling balls when they go bowling. They each take a number (in the range 0..99), though, and line up in a standard bowling-pin-like triangle like this:

          7
        3   8
      8   1   0
    2   7   4   4
  4   5   2   6   5
Then the other cows traverse the triangle starting from its tip and moving "down" to one of the two diagonally adjacent cows until the "bottom" row is reached. The cow's score is the sum of the numbers of the cows visited along the way. The cow with the highest score wins that frame.

Given a triangle with N (1 <= N <= 350) rows, determine the highest possible sum achievable.

입력 설명

Line 1: A single integer, N

Lines 2..N+1: Line i+1 contains i space-separated integers that represent row i of the triangle.

출력 설명

Line 1: The largest sum achievable using the traversal rules

입력 예시 Copy

5
7
3 8
8 1 0
2 7 4 4
4 5 2 6 5

출력 예시 Copy

30

출처/분류