def convert(namef):
    lt = []
    with open (namef, 'r') as f:
        l1 = f.readline()
        for line in f:
            lin = line.split()
            time = int(lin[1])*3600 + int(lin[2])*60 + int(lin[3]) 
            lt.append((lin[0], time, lin[4]))
    return lt

def time_under(lt, threshold):
    for runner in lt:
        if runner[1] < threshold:
            return True
    return False

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