4344번 '평균은 넘겠지'

let count = Int(readLine()!)!
var array = [[Int]]()
for _ in 1...count{
    if let temp = readLine()?.split(separator: " ").map({ Int($0)! }){
        array.append(temp)
    }
}
for i in 0..<count{
    var input = array[i]
    let numberOfStudents: Double = Double(input.first!)
    input.removeFirst()
    let average = Double((input.reduce(0) { $0 + $1 })) / numberOfStudents
    var count = 0
    for i in input{
        if(Double(i) > average){
            count += 1
        }
    }
    var result = Double(count) / numberOfStudents
    result *= 100.0
    var real = String((result*1000).rounded() / 1000)
    let stringCount = real.count
    
 
    if(stringCount == 3){
        real += "00"
    }
    else if(stringCount == 4){
        real += "00"
    }
    else if(stringCount == 5){
        real += "0"
    }
    print(real+"%")
}