4722: P8601 [蓝桥杯 2013 省 A] 剪格子
Memory Limit:128 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
Description

Input

Output

Sample Input Copy
3 3
10 1 52
20 30 1
1 2 3
Sample Output Copy
3
HINT
