4713: P8687 [蓝桥杯 2019 省 A] 糖果
          Memory Limit:128 MB
          Time Limit:1.000 S
         
      
      
        
          Judge Style:Text Compare
          Creator:
      
      
          Submit:0
          Solved:0
      
Description

Input

Output

Sample Input Copy
6 5 3
1 1 2
1 2 3
1 1 3
2 3 5
5 4 2
5 1 2Sample Output Copy
2HINT
