(swift) -[백준/boj] 4344번: 평균은 넘겠지

 

https://www.acmicpc.net/problem/4344

4344번: 평균은 넘겠지

 

 

 

import Foundation

let C = Int(readLine()!)
func overAverageCount(_ average:Int, _ arr: Array<Int>)->Double{
    var count: Double = 0.0
    for idx in 1...arr[0]{
        if arr[idx] > average {
            count += 1
        }
    }
    
    return (count/Double(arr[0]))*100
}

func sum(_ arr: Array<Int>)-> Int{
    var sum = 0
    for idx in 1...arr[0]{
        sum += arr[idx]
    }
    
    return sum/arr[0]
}

for _ in 1...C!{
    let scores = readLine()?.split(separator: " ").map{Int($0)!}
    let average = sum(scores!)
    let ret = round(1000*overAverageCount(average, scores!))/1000
    let answer = String(format: "%.3f", ret)
    print("\(answer)%")
}