7324: Triangle: The Data Structure(Problem S5)
内存限制：128 MB
时间限制：1.000 S
评测方式：文本比较
命题人：
提交：0
解决：0
题目描述
输入
The first line contains two space-separated integers N and K (1 ≤ K ≤ N ≤ 3000).
Following this are N lines describing the triangle. The i-th of these lines contains i space-separated integers ai,j (0 ≤ ai,j ≤ 109 ), representing the i-th row of the triangle.
For 4 of the 15 available marks, N ≤ 1000.
输出
Output the integer sum of the maximum elements of every sub-triangle of size K.
样例输入 复制
4 2
3
1 2
4 2 1
6 1 4 2样例输出 复制
23