35 . stack 練習
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Description
Input Format
Output Format
Sample Input 1
5
1 2
1 3
2
2
2
1 2
1 3
2
2
2
Sample Output 1
3
2
empty!
2
empty!
Hints
Problem Source
NEOJ Problem 36
Subtasks
| No. | Testdata Range | Constraints | Score |
|---|---|---|---|
| 1 | 0 | 100 |