def converteix(nomf):
    lt = []
    with open (nomf, 'r') as f:
        l1 = f.readline()
        for linia in f:
            lin = linia.strip().split()
            temps = int(lin[1])*3600 + int(lin[2])*60 + int(lin[3]) 
            lt.append((lin[0], temps, lin[4]))
    return lt

def temps_sota(lt, llindar):
    for corredor in lt:
        if corredor[1] < llindar:
            return True
    return False

def diferencia_primer(lt, nomf):
    with open(nomf, 'w') as f:
        tp = lt[0][1]
        for corredor in lt:
            td = corredor[1] - tp
            f.write(corredor[0]+' '+str(td)+ '\n')