#!/bin/sh
wget -q ftp://tgftp.nws.noaa.gov/data/observations/metar/stations/.txt -O - | grep  | python -c 'import math,sys;a,b=[int(x.replace("M","-")) for x in [f for f in sys.stdin.readline().split() if "/" in f][0].split("/")];print("Humidité relative: %.1f%%"%(100*math.exp(17.67*(b/(b+243.5)-a/(a+243.5)))))'