|
| 1 | +varUndergroundSystem=function(){ |
| 2 | +this.stationSystem={}; |
| 3 | +this.averageTime={}; |
| 4 | +}; |
| 5 | + |
| 6 | +/** |
| 7 | + * https://leetcode.com/problems/design-underground-system |
| 8 | + * Time O(1) | Space O(1) |
| 9 | + *@param {number} id |
| 10 | + *@param {string} stationName |
| 11 | + *@param {number} t |
| 12 | + *@return {void} |
| 13 | + */ |
| 14 | +UndergroundSystem.prototype.checkIn=function(id,stationName,t){ |
| 15 | +this.stationSystem[id]=[stationName,'',t,'']; |
| 16 | +}; |
| 17 | + |
| 18 | +/** Time O(1) | Space O(1) |
| 19 | + *@param {number} id |
| 20 | + *@param {string} stationName |
| 21 | + *@param {number} t |
| 22 | + *@return {void} |
| 23 | + */ |
| 24 | +UndergroundSystem.prototype.checkOut=function(id,stationName,t){ |
| 25 | +constuser=this.stationSystem[id]; |
| 26 | +//1 is the position where we store end station |
| 27 | +// 3 is the position where we store end time |
| 28 | +user[1]=stationName; |
| 29 | +user[3]=t; |
| 30 | +console.log(user); |
| 31 | +conststationHash=`${user[0]}-${user[1]}`; |
| 32 | +// console.log(stationHash, this.stationHash); |
| 33 | +if(this.averageTime[stationHash]){ |
| 34 | +this.averageTime[stationHash][0]+=1; |
| 35 | +this.averageTime[stationHash][1]+=user[3]-user[2]; |
| 36 | +}else{ |
| 37 | +this.averageTime[stationHash]=[]; |
| 38 | +this.averageTime[stationHash][0]=1; |
| 39 | +this.averageTime[stationHash][1]=user[3]-user[2]; |
| 40 | +} |
| 41 | +}; |
| 42 | + |
| 43 | +/** Time O(1) | Space O(1) |
| 44 | + *@param {string} startStation |
| 45 | + *@param {string} endStation |
| 46 | + *@return {number} |
| 47 | + */ |
| 48 | +UndergroundSystem.prototype.getAverageTime=function(startStation,endStation){ |
| 49 | +// console.log(this.averageTime); |
| 50 | +const[rounds,totalHours]=this.averageTime[`${startStation}-${endStation}`]; |
| 51 | +returntotalHours/rounds; |
| 52 | +}; |
| 53 | + |
| 54 | +/** |
| 55 | + * Your UndergroundSystem object will be instantiated and called as such: |
| 56 | + * var obj = new UndergroundSystem() |
| 57 | + * obj.checkIn(id,stationName,t) |
| 58 | + * obj.checkOut(id,stationName,t) |
| 59 | + * var param_3 = obj.getAverageTime(startStation,endStation) |
| 60 | + */ |