Take the 2-minute tour ×  Looking for help in revising my
algorithm. I need to find one that will give me the row and
column of a cell on a grid.  The grid is $t \times t$. For
example, this is a grid for $t=5$. Now given $n$, find the row
and column. $$\begin{array}{|c|c|c|c|c|} 1& 2& 3& 4& 5\\ 6& 7&
8& 9& 10\\ 11& 12& 13& 14& 15\\ 16& 17& 18& 19& 20\\ 21& 22& 23&
24& 25 \end{array}$$  My attempt:  row: $n / t + 1$ column: $n
\bmod t$  Second attempt:  $\operatorname{row}(x, t) = ((x-x
\bmod t)/t)+1$  $\operatorname{column}(x,t) = (x-1) \bmod t+1$
Doesn't work for $n = t^2$  share|improve this question add
comment  1 Answer  up vote 2 down vote accepted  The row is :$$r
= \lfloor \frac{n-1}{t} \rfloor + 1$$  The column is:$$c = n -
t(r-1)$$  share|improve this answer If zero indexing were to be
used ($0,1,2,\ldots$ instead of $1,2,\ldots$) then the answer
would look cleaner. $c$ could also be (n-1)%t+1. –  adam W Feb
26 '13 at 16:23 I understand, thank you! –  МикроПингвин Feb 26
'13 at 16:26 Glad to hear i