题解区，请
https://www.luogu.com.cn/problem/solution/P2871
by wheneveright @ 2021-08-26 16:35:47
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#@[wheneveright](/user/189351)
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# 看不懂
by 机智的娃 @ 2021-08-26 16:40:36
[百度，请](https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd=%E6%BB%9A%E5%8A%A8%E6%95%B0%E7%BB%84&fenlei=256&rsv_pq=961b6bc00002a6ae&rsv_t=db6ch2IDo%2BVF%2B8cmeSxe3H4XGoKRIZoUJ4FlfXkv9Zaq76I3HeniIRA4WHg&rqlang=cn&rsv_enter=1&rsv_dl=tb&rsv_sug3=14&rsv_sug1=12&rsv_sug7=100&rsv_sug2=0&rsv_btype=i&inputT=3671&rsv_sug4=3671)
如果你认为百度都无法帮到你，那么我也无能为力
by wheneveright @ 2021-08-26 16:41:30
@[wheneveright](/user/189351)
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# ok
by 机智的娃 @ 2021-08-26 16:43:02