jetlag2

def counting(zones):
    crossed=[]
    suma=[]
    out=[]
    for i in range(len(zones)):
        zones[i]+=12
        zones[i]=zones[i]%24
    for i in range(24):
        crossed.append([])
        for j in range(len(zones)):
            crossed[i].append(min(abs(i-zones[j]),24-(abs(i-zones[j]))))
    for i in range(24):
        suma.append(sum(crossed[i]))
    for i in range(24):
        if(suma[i]==min(suma)):
            out.append(i-12)
    return out