gistfile1.txt

def solution(S):
    lines = S.split('\n')
    dict = {}
    for i in xrange(len(lines)):
        line = lines[i]
        if len(line) == 0:
            continue

        # Parse values
        vals = line.split(',')
        hh, mm, ss = vals[0].split(':')
        phone = vals[1]
        seconds = int(ss) + int(mm) * 60 + int(hh) * 3600

        # Add seconds to phone number
        if phone not in dict:
            dict[phone] = 0
        dict[phone] += seconds

    # Find a phone with most seconds
    max = 0
    max_phone = ''
    for key, val in dict.items():
        if val > max:
            max = val
            max_phone = key
        # Handle a tie
        if val == max:
            if key < max_phone:
                max = val
                max_phoney = key

    # Calculate the cost
    cost = 0
    for phone, seconds in dict.items():
        if seconds == max:
            continue

        if seconds < 300:
            cost += seconds * 3

        elif seconds >= 300:
            mins = seconds // 60
            if seconds % 60 > 0:
                mins += 1
            cost += mins * 150

    return cost

nice