[Swift] 프로그래머스_삼총사

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<문제>

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<풀이>

import Foundation

func solution(_ number:[Int]) -> Int {
    var count = 0
    for i in 0..<number.count {
        for j in i + 1..<number.count {
            for k in j + 1..<number.count {
                if number[i] + number[j] + number[k] == 0 {
                    count += 1
                }
            }
        }
    }
    return count
}

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