OnTimeForExam

function squareArea(input){
  let arriveHour = Number(input[0])
  let arriveMinute = Number(input[1])
  let examHour = Number(input[2])
  let examMinute = Number(input[3])
  let hour = 0
  let min = 0

  let arriveTimeInMinutes = arriveHour * 60 + arriveMinute
  let examTimeInMinutes = examHour * 60 + examMinute
  let diff = Math.abs(arriveTimeInMinutes - examTimeInMinutes)

  if(arriveTimeInMinutes >= examTimeInMinutes){
      hour = Math.floor(diff / 60)
      min = diff % 60
      if(min > 60){
        hour += 1;
        min -= 60
      }
      if(hour == 0 && min <= 30){
        console.log(`On time`)
        if (min != 0){
          console.log(`${min} minutes before the start`)
        }
      }else if(min > 30 || hour > 0){
        console.log(`Early`)
        if(hour == 0){
          console.log(`${min} minutes before the start`)
        }else if(hour > 0){
          if (min < 10){
            console.log(`${hour}:0${min} hours before the start`)
          }else{
            console.log(`${hour}:${min} hours before the start`)
          }
        }
      }
  }else{
    hour = Math.floor(diff / 60)
      min = diff % 60
      if(min > 60){
        hour += 1;
        min -= 60
      }
    console.log(`Late`)
    if(hour == 0){
      if (min < 10){
        console.log(`${min} minutes after the start`)
      }else{
        console.log(`${min} minutes after the start`)
      }
    }else if(hour > 0){
      if (min < 10){
        console.log(`${hour}:0${min} hours after the start`)
      }else{
        console.log(`${hour}:${min} hours after the start`)
      }
    }
  }
}