const MS_PER_HALF_HOUR = 1000 * 60 * 30;
const MS_PER_DAY = 1000 * 3600 * 24;

const test2 = (visitsTime) => {
  if(visitsTime.length < 6) {
    return false;
  }
  visitsTime = visitsTime.map(e => Date.parse(e));

  let sessions = 1;
  for(let i = 1; i < visitsTime.length; i++){
    if(visitsTime[i] - visitsTime[i-1] > MS_PER_HALF_HOUR) {
      sessions++;
      if(sessions >= 6){
        break;
      }
    }
  }

  if(sessions < 6) {
    return false;
  }

  let lastDay = Math.floor(visitsTime[visitsTime.length - 1] / MS_PER_DAY);
  let daysCounter = 1;
  for(let i = visitsTime.length - 2; i >= 0; i--) {
    if(daysCounter === 3) {
      return true;
    }
    let currentDay = Math.floor(visitsTime[i] / MS_PER_DAY);
    if(lastDay - currentDay === 1){
      lastDay = currentDay;
      daysCounter++;
    }
    else{
      if(lastDay - currentDay > 1){
        return false;
      }
    }
  }
  return false;
}