/**
\* \_ooOoo\_
\* o8888888o
\* 88" . "88
\* (| -\_- |)
\* O\ = /O
\* \_\_\_\_/`---'\_\_\_\_
\* .' \\| |// `.
\* / \\||| : |||// \
\* / \_||||| -:- |||||- \
\* | | \\\ - /// | |
\* | \_| ''\---/'' | |
\* \ .-\_\_ `-` \_\_\_/-. /
\* \_\_\_`. .' /--.--\ `. . \_\_
\* ."" '< `.\_\_\_\_<|>\_/\_\_\_.' >'"".
\* | | : `- \`.;`\ \_ /`;.`/ - ` : | |
\* \ \ `-. \_ \_\_\ /\_\_ \_/ .-` / /
\* ======`-.\_\_\_\_`-.\_\_\_\_\_\_\_\_/\_\_\_.-`\_\_\_\_.-'======
\* `=---='
\* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
\* 佛祖保佑 永无BUG
\*/
/**
\* \_ooOoo\_
\* o8888888o
\* 88" . "88
\* (| -\_- |)
\* O\ = /O
\* \_\_\_/`---'\_\_\_\_
\* . ' \\| |// `.
\* / \\||| : |||// \
\* / \_||||| -:- |||||- \
\* | | \\\ - /// | |
\* | \_| ''\---/'' | |
\* \ .-\_\_ `-` \_\_\_/-. /
\* \_\_\_`. .' /--.--\ `. . \_\_
\* ."" '< `.\_\_\_\_<|>\_/\_\_\_.' >'"".
\* | | : `- \`.;`\ \_ /`;.`/ - ` : | |
\* \ \ `-. \_ \_\_\ /\_\_ \_/ .-` / /
\* ======`-.\_\_\_\_`-.\_\_\_\_\_\_\_\_/\_\_\_.-`\_\_\_\_.-'======
\* `=---='
\* .............................................
\* 佛曰：bug泛滥，我已瘫痪！
\*/
```cpp
//<!--
// ::
// :;J7, :, ::;7:
// ,ivYi, , ;LLLFS:
// :iv7Yi :7ri;j5PL
// ,:ivYLvr ,ivrrirrY2X,
// :;[email protected]: :ivu@kexianli.
// :iL7::,:::iiirii:ii;::::,,irvF7rvvLujL7ur
// ri::,:,::i:iiiiiii:i:irrv177JX7rYXqZEkvv17
// ;i:, , ::::iirrririi:i:::iiir2XXvii;L8OGJr71i
// :,, ,,: ,::[email protected]:i:::j1jri7ZBOS7ivv,
// ,::, ::rv77iiiriii:iii:i::,[email protected]
// ,, ,, ,:ir7ir::,:::i;ir:::i:i::rSGGYri712:
// ::: ,v7r:: ::rrv77:, ,, ,:i7rrii:::::, ir7ri7Lri
// , 2OBBOi,iiir;r:: ,irriiii::,, ,iv7Luur:
// ,, i78MBBi,:,:::,:, :7FSL: ,iriii:::i::,,:rLqXv::
// : iuMMP: :,:::,:ii;2GY7OBB0viiii:i:iii:i:::iJqL;::
// , ::::i ,,,,, ::LuBBu BBBBBErii:i:i:i:i:i:i:r77ii
// , : , ,,:::rruBZ1MBBqi, :,,,:::,::::::iiriri:
// , ,,,,::::i: @arqiao. ,:,, ,:::ii;i7:
// :, rjujLYLi ,,:::::,:::::::::,, ,:i,:,,,,,::i:iii
// :: BBBBBBBBB0, ,,::: , ,:::::: , ,,,, ,,:::::::
// i, , ,8BMMBBBBBBi ,,:,, ,,, , , , , , :,::ii::i::
// : iZMOMOMBBM2::::::::::,,,, ,,,,,,:,,,::::i:irr:i:::,
// i ,,:;u0MBMOG1L:::i:::::: ,,,::, ,,, ::::::i:i:iirii:i:i:
// : ,iuUuuXUkFu7i:iii:i:::, :,:,: ::::::::i:i:::::iirr7iiri::
// : :[email protected]:::::, ,:ii:::::::i:::::i::,::::iirrriiiri::,
// : 5BMBBBBBBSr:,::rv2kuii:::iii::,:i:,, , ,,:,:i@petermu.,
// , :r50EZ8MBBBBGOBBBZP7::::i::,:::::,: :,:,::i;rrririiii::
// :jujYY7LS0ujJL7r::,::i::,::::::::::::::iirirrrrrrr:ii:
// ,: :@kevensun.:,:,,,::::i:i:::::,,::::::iir;ii;7v77;ii;i,
// ,,, ,,:,::::::i:iiiii:i::::,, ::::[email protected];7:i,
// , , ,,,:,,::::::::iiiiiiiiii:,:,:::::::::iiir;ri7vL77rrirri::
// :,, , ::::::::i:::i:::i:i::,,,,,:,::i:i:::iir;@Secbone.ii:::
//
//-->
```
by 殇雪 @ 2018-01-13 12:02:38
贴上这个就好了
by 殇雪 @ 2018-01-13 12:04:35
那我过了你的两个样例结果wa成0分岂不是很难受。
by mona @ 2018-03-31 20:40:32
不过谢谢LZ提供的样例，让我知道了这道题到底有多么的好~~（简直丧心病狂）~~
by mona @ 2018-03-31 21:41:01
第三个数据第二个输出应该是maybe还是true。。似乎现有的题解输出的是maybe
by naive_wcx @ 2018-05-01 09:08:53
@[bzy369258147](/space/show?uid=47240)
这样例的格式好奇怪的感觉
by misinclair @ 2018-07-09 07:37:17
9 9 为啥是true啊
by misinclair @ 2018-07-09 07:40:37
第一个样例的y[i]不单调啊，题目上说y[i]是单调的
by fixed_1 @ 2018-10-21 20:10:58
感谢lz提供的良心样例！！！~~(我三个样例一开始一个都没过)~~
by radish布団 @ 2018-11-05 15:44:50
好贴qwq
by kkxhh @ 2019-02-11 21:29:53