给你一组小数据
```
10
1 1
1 1
1 7
6 1
1 5
5 7
1 8
1 7
3 5
3 9
```
```
7
5
3
7
```
by GBLoi @ 2021-03-26 19:08:44
@[ProgramsVSProblems](/user/233462)
by GBLoi @ 2021-03-26 19:10:30
哦，谢谢大佬@[GBLoi](/user/234913)
by Umbrella_Leaf @ 2021-03-26 19:24:28
原来第 3 个操作里可以出现不在 Treap 中的数
by Umbrella_Leaf @ 2021-03-26 19:26:47