2843 . Non-redundant Drive
TopCoder
Input Format
Output Format
Sample Input 1
5 5 8 1 3 5 1 2 4 2 3 3 2 4 3 1 5 7
Sample Output 1
4
Sample Input 2
2 10 1 1 2 10
Sample Output 2
2
Sample Input 3
5 1 3 5 1 1 1 2 5 2 3 3 2 4 3 1 5 5
Sample Output 3
3
Hints
Problem Source
Migrated from old NTUJ.
Subtasks
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