/**
* @param {number[][]} intervals
* @return {boolean}
*/
var canAttendMeetings = function(intervals) {
 if (intervals.length <= 1) {
   return true;
 }

 // Sort by start time
 intervals.sort((a, b) => a[0] - b[0]);

 for (let i = 1; i < intervals.length; i++) {
   const currentInterval = intervals[i];
   const previousInterval = intervals[i - 1];
   
   const [currentStart, currentEnd] = currentInterval;
   const [previousStart, previousEnd] = previousInterval;

   if (currentStart < previousEnd) {
     return false;
   }
 }
 
 return true;
};