05. Game Of Intervals

package main

import "fmt"

func main() {
    var n int
    fmt.Scanln(&n)

    var num0To10 = 0
    var num10To20 = 0
    var num20To30 = 0
    var num30To40 = 0
    var num40To50 = 0
    var invalidNum = 0
    var result = 0.0

    var number float64

    for i := 0; i < n; i++ {
        fmt.Scanln(&number)
        if number >= 0 && number < 10 {
            result += number * 0.2
            num0To10++
        } else if number >= 10 && number < 20 {
            result += number * 0.3
            num10To20++
        } else if number >= 20 && number < 30 {
            result += number * 0.4
            num20To30++
        } else if number >= 30 && number < 40 {
            result += 50
            num30To40++
        } else if number >= 40 && number <= 50 {
            result += 100
            num40To50++
        } else{
            result /= 2
            invalidNum++
        }
    }

    fmt.Printf("%.2f\n", result)
    fmt.Printf("From 0 to 9: %.2f%%\n", float64(num0To10) / float64(n) * 100.0)
    fmt.Printf("From 10 to 19: %.2f%%\n", float64(num10To20) / float64(n) * 100.0)
    fmt.Printf("From 20 to 29: %.2f%%\n", float64(num20To30) / float64(n) * 100.0)
    fmt.Printf("From 30 to 39: %.2f%%\n", float64(num30To40) / float64(n) * 100.0)
    fmt.Printf("From 40 to 50: %.2f%%\n", float64(num40To50) / float64(n) * 100.0)
    fmt.Printf("Invalid numbers: %.2f%%\n", float64(invalidNum) / float64(n * 100))
}