Created
January 28, 2019 09:00
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Ramanujan's Magic Square
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function magicSquare(date) { | |
date = date instanceof Date ? date : new Date(date); | |
var d = date.getDate(), | |
m = date.getMonth() + 1, | |
c = ~~(date.getFullYear() / 100), | |
y = date.getFullYear() % 100; | |
return [ | |
[d, m, c, y], | |
[y + 1, c - 1, m - 3, d + 3], | |
[m - 2, d + 2, y + 2, c - 2], | |
[c + 1, y - 1, d + 1, m - 1] | |
]; | |
} | |
/** | |
* Example: | |
* magicSquare(new Date(1994, 4, 1)); | |
* | |
* Output: | |
* [ | |
* [1, 5, 19, 94], | |
* [95, 18, 2, 4], | |
* [3, 3, 96, 17], | |
* [20, 93, 2, 4] | |
* ]; | |
*/ |
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