Buggy python submission (verdict: Time Limit Exceeded):
Period, WorkingDay, PausePeriod = map(int, input().split())
S = input()
SReverse = S[::-1]

"""
Calculate the day that you can work the fastest and the day that you can work
the slowest. If two days coincide, that day is always a working day.
"""
earliest_days = [-1 for _ in range(Period)]
slowest_days = [-2 for _ in range(Period)]

for days in (earliest_days, slowest_days):
    i_day = 0
    if days == earliest_days:
        i_work_day = 1
        diff_from_next_work = 1
        passion_days = S
    else:
        i_work_day = WorkingDay
        diff_from_next_work = - 1
        passion_days = SReverse
    
    while 1 <= i_work_day and i_work_day <= WorkingDay:
        if passion_days[i_day] == 'o':
            days[i_day] = i_work_day
            i_work_day += diff_from_next_work
            i_day += PausePeriod
        i_day += 1

slowest_days.reverse()
for earliest_day, slowest_day in zip(earliest_days, slowest_days):
    if earliest_day == slowest_day:
        print(earliest_days.index(earliest_day) + 1)

exit()

Fixed submission:
N, K, C = map(int, input().split())
S = input()
S_reverse = S[::-1]

left_justified = [-1 for _ in range(N)]
right_justified = [-2 for _ in range(N)]

for i_justified in (left_justified, right_justified):
    if i_justified == left_justified:
        i_S = S
        nearest_position = 1
        positioning = 1
    else:
        i_S = S_reverse
        nearest_position = K
        positioning = -1
    
    i_K = 0
    
    while i_K <= N-1:
        if i_S[i_K] == 'o':
            i_justified[i_K] = nearest_position
            i_K += C
            nearest_position += positioning
        i_K += 1

for i_N in range(N):
    if left_justified[i_N] == right_justified[N - i_N - 1]:
        print(i_N + 1)

Buggy python submission (verdict: Time Limit Exceeded):
Period, WorkingDay, PausePeriod = map(int, input().split())
PassionDays = input()

"""
Calculate the day that you can work the fastest and the day that you can work
the slowest. If two days coincide, that day is always a working day.
"""
earliest_days = [-1 for _ in range(Period)]
slowest_days = [-2 for _ in range(Period)]

for days in (earliest_days, slowest_days):
    
    if days == earliest_days:
        i_day = 0
        i_work_day = 1
        pause_period = PausePeriod
        diff_from_next = 1
    else:
        i_day = Period - 1
        i_work_day = WorkingDay
        pause_period = PausePeriod * (-1)
        diff_from_next = -1
    
    while 1 <= i_work_day and i_work_day <= WorkingDay:
        if PassionDays[i_day] == 'o':
            days[i_day] = i_work_day
            i_work_day += diff_from_next
            i_day += pause_period
        i_day += diff_from_next

for earliest_day, slowest_day in zip(earliest_days, slowest_days):
    if earliest_day == slowest_day:
        print(earliest_days.index(earliest_day) + 1)

exit()

Fixed submission:
N, K, C = map(int, input().split())
S = input()
S_reverse = S[::-1]

left_justified = [-1 for _ in range(N)]
right_justified = [-2 for _ in range(N)]

for i_justified in (left_justified, right_justified):
    if i_justified == left_justified:
        i_S = S
        nearest_position = 1
        positioning = 1
    else:
        i_S = S_reverse
        nearest_position = K
        positioning = -1
    
    i_K = 0
    
    while i_K <= N-1:
        if i_S[i_K] == 'o':
            i_justified[i_K] = nearest_position
            i_K += C
            nearest_position += positioning
        i_K += 1

for i_N in range(N):
    if left_justified[i_N] == right_justified[N - i_N - 1]:
        print(i_N + 1)