5 lines
204 B
Groovy
5 lines
204 B
Groovy
def zz = { n ->
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(0..<n*n).collect { [x:it%n,y:(int)(it/n)] }.sort { c->
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[c.x+c.y, (((c.x+c.y)%2) ? c.y : -c.y)]
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}.with { l -> l.inject(new int[n][n]) { a, c -> a[c.y][c.x] = l.indexOf(c); a } }
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}
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