Editorial for WC '18 Contest 3 J3 - R - Olympiads Online Judge

Editorial for WC '18 Contest 3 J3 - R

Remember to use this editorial 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.

We'll go row by row from top to bottom, determining and outputting each one as we go.

The first row consists of $R-1$ $R - 1$ #'s followed by one ..

The next $R-2$ $R - 2$ rows each consist of one #, followed by $R-2$ $R - 2$ .'s, followed by one #.

The next row is the same as the first row.

Finally, $R-1$ $R - 1$ rows remain. The $i$ $i$ -th of these contains a # in column $1$ $1$ and another in column $i+1$ $i + 1$ . In other words, it consists of one #, followed by $i-1$ $i - 1$ .'s, followed by one #, followed by $R-i-1$ $R - i - 1$ .'s.

Comments

There are no comments at the moment.