Javascript Program to Form coils in a matrix
Last Updated :
13 Jun, 2022
Given a positive integer n which represents the dimensions of a 4n x 4n matrix with values from 1 to n filled from left to right and top to bottom. Form two coils from the matrix and print the coils.
Examples:
Input : n = 1;
Output : Coil 1 : 10 6 2 3 4 8 12 16
Coil 2 : 7 11 15 14 13 9 5 1
Explanation : Matrix is
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
Input : n = 2;
Output : Coil 1 : 36 28 20 21 22 30 38 46 54
53 52 51 50 42 34 26 18 10
2 3 4 5 6 7 8 16 24 32 40
48 56 64
Coil 2 : 29 37 45 44 43 35 27 19 11 12
13 14 15 23 31 39 47 55 63 62
61 60 59 58 57 49 41 33 25 17
9 1
The total elements in the matrix are 16n2. All elements are divided into two coils. Every coil has 8n2 elements. We make two arrays of this size. We first fill elements in coil1 by traversing them in the given order. Once we have filled elements in coil1, we can get elements of other coil2 using formula coil2[i] = 16*n*n + 1 -coil1[i].
Javascript
<script>
function printCoils(n)
{
let m = 8 * n * n;
let coil1 = new Array(m);
coil1.fill(0);
coil1[0] = 8 * n * n + 2 * n;
let curr = coil1[0];
let nflg = 1, step = 2;
let index = 1;
while (index < m)
{
for (let i = 0; i < step; i++)
{
curr = coil1[index++]
= (curr - 4 * n * nflg);
if (index >= m)
break ;
}
if (index >= m)
break ;
for (let i = 0; i < step; i++)
{
curr = coil1[index++] = curr
+ nflg;
if (index >= m)
break ;
}
nflg = nflg * (-1);
step += 2;
}
let coil2 = new Array(m);
coil2.fill(0);
for (let i = 0; i < 8 * n * n; i++)
coil2[i] = 16 * n * n + 1 - coil1[i];
document.write( "Coil 1 : " );
for (let i = 0; i < 8 * n * n; i++)
document.write(coil1[i] + " " );
document.write( "</br>" + "Coil 2 : " );
for (let i = 0; i < 8 * n * n; i++)
document.write(coil2[i] + " " );
}
let n = 1;
printCoils(n);
</script>
|
Output:
Coil 1 : 10 6 2 3 4 8 12 16
Coil 2 : 7 11 15 14 13 9 5 1
Time Complexity: O(n2), where n represents the given integer.
Auxiliary Space: O(n2), where n represents the given integer.
Please refer complete article on Form coils in a matrix for more details!
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