## Editorial for DMOPC '17 Contest 1 P1 - Fujō Neko

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**only**when stuck, and**not to copy-paste code from it**. Please be respectful to the problem author and editorialist.**Submitting an official solution before solving the problem yourself is a bannable offence.**Author:

For the first subtask, we can loop through the column and row and check if there's an `X`

.

**Time Complexity:**

For the second subtask, we can preprocess the grid and create two arrays, and . Let be true if there is an `X`

on column and be true if there is an `X`

on row . To answer each query, we just check if or is true.

**Time Complexity:**

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