02. Exam Preparation

package main

import "fmt"

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

    var task string
    fmt.Scanln(&task)

    var lastProblem = ""
    var badGradesCounter = 0
    var tasksCount = 0
    var grade float64
    var sumGrades = 0.0

    for ; badGradesCounter != badGrades && task != "Enough"; {
        fmt.Scanln(&grade)
        if (grade <= 4) {
            badGradesCounter++
        }
        sumGrades += grade
        lastProblem = task
        tasksCount++
        fmt.Scanln(&task)
    }

    if badGradesCounter == badGrades {
        fmt.Printf("You need a break, %d poor grades.\n", badGrades)
    } else {
        fmt.Printf("Average score: %.2f\n", sumGrades / float64(tasksCount))
        fmt.Printf("Number of problems: %d\n", tasksCount)
        fmt.Printf("Last problem: %s\n", lastProblem)
    }
}