27 人解决，46 人已尝试。
28 份提交通过，共有 70 份提交。
5.0 EMB 奖励。
单点时限: 2.0 sec
内存限制: 256 MB
The farm has many hills upon which Farmer John would like to place guards to ensure the safety of his valuable milk-cows.
He wonders how many guards he will need if he wishes to put one on top of each hill. He has a map supplied as a matrix of integers; the matrix has N (1 < N <= 100) rows and M (1 < M <= 70) columns. Each member of the matrix is an altitude H_ij (0 <= H_ij <= 10,000).
Help him determine the number of hilltops on the map.
A hilltop is one or more adjacent matrix elements of the same value surrounded xclusively by either the edge of the map or elements with a lower (smaller) altitude. Two different elements are adjacent if the magnitude of difference in their X coordinates is no greater than 1 and the magnitude of differences in their Y coordinates is also no greater than 1.
Line 1: Two space-separated integers: N and M
Lines 2..N+1: Line i+1 describes row i of the matrix with M
space-separated integers: H_ij
8 7 4 3 2 2 1 0 1 3 3 3 2 1 0 1 2 2 2 2 1 0 0 2 1 1 1 1 0 0 1 1 0 0 0 1 0 0 0 0 1 1 1 0 0 1 2 2 1 1 0 0 1 1 1 2 1 0
3 OUTPUT DETAILS: There are three peaks: The one with height 4 on the left top, one of the points with height 2 at the bottom part, and one of the points with height 1 on the right top corner.
27 人解决，46 人已尝试。
28 份提交通过，共有 70 份提交。
5.0 EMB 奖励。