The editorial for D1 ( Easy version ) , I am facing difficulties understanding the editorial solution ... ↵
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Problem LINK : [ here ](https://codeforces.net/contest/1695/problem/D1)↵
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`Note that because we guarantee that the root is a query, when we are computing the answer for any node 'v'↵
in this DFS, we can assume that either 'v'↵
or some vertex not in the subtree of 'v'↵
has already been queried.`↵
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can someone elaborate little ?
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Problem LINK : [ here ](https://codeforces.net/contest/1695/problem/D1)↵
↵
`Note that because we guarantee that the root is a query, when we are computing the answer for any node 'v'↵
in this DFS, we can assume that either 'v'↵
or some vertex not in the subtree of 'v'↵
has already been queried.`↵
↵
can someone elaborate little ?
