task: task number, Int, [1-3], default:1
number: show nth path of a floor, default:0
input: selet the data dir of which floor, default: `./data/site1/F1`
bssid: the wifi bssid for task 3, defualt: ''(will plot 3 default wifi heat map)
First, get data folder from: indoor-location-competition-20
1. Task1
python3 main.py -t 1 -n 0
2. Task2
python3 main.py -t 2
3. Task3
python3 main.py -t 3