function solve(...arr){
   let steps = arr.shift();
   let length = arr.shift();
   let speed = arr.shift();
   let distanceInMeters = steps * length;
   let timeInHours = 0;
   let rests = Math.floor(distanceInMeters / 500);
   let distanceInKilometers = distanceInMeters / 1000;
   timeInHours = distanceInKilometers / speed + rests / 60;
   let timeInHoursTrunc = Math.trunc(timeInHours);
   let time = '';
   if(timeInHoursTrunc < 1){
       time += '00:'
   }else if(timeInHoursTrunc <= 9){
       time += '0' + timeInHoursTrunc + ':';
   }else{
    time += timeInHoursTrunc + ':';
   }
   let timeInMinutes = timeInHours * 60;
   let timeInMinutesTrunc = Math.trunc(timeInMinutes)
   let seconds = timeInMinutes - parseInt(timeInMinutes);
   let timeInSeconds = Math.ceil(seconds * 60);
   if(timeInMinutesTrunc < 1){
    time += '00:'
   }else if(timeInMinutesTrunc <= 9){
    time += '0' + timeInMinutesTrunc + ':';
   }else{
    time += timeInMinutesTrunc + ':';
   }
   if(timeInSeconds < 1){
    time += '00'
   }else if(timeInSeconds <= 9){
    time += '0' + timeInSeconds;
   }else{
    time += timeInSeconds;
   }
   console.log(time);
}