triangle.swift

let rightTriangles = {
    (1...10).flatMap { c in
        (1...c).flatMap { a in
            (1...a).flatMap { b in
                (a,b,c)
            }
        }
    }.filter { (a,b,c) in
        let b1 = a*a + b*b == c*c
        let b2 = a+b+c == 24
        return b1 && b2
    }
}()