Buggy python submission (verdict: Time Limit Exceeded):

S = input()
N = len(S) + 1
settingIndex = 0
result = [ -1 for i in range(N) ]

def countContinueChar(index):
    startChar = S[index]
    count = 0
    for i in range(index, N-1):
        if S[i] != startChar:
            break
        count += 1
    return count

def getValueOfIndex(index, current, prev = ''):
    if S[index] == '<':
        if prev == '>':
            return 0
        else:
            return current + 1
    else:
        if prev == '<':
            v = countContinueChar(index)
            if v < current + 1:
                return current + 1
            else:
                return v
        else:
            return countContinueChar(index)

current = -1
prev = ''
sum = 0
for i in range(N):
    if i == N-1:
        if S[-1] == '<':
            result[i] = current + 1
            sum += current + 1
        else:
            result[i] = 0
        break
    if i > 0:
        prev = S[i - 1]
    current = getValueOfIndex(i, current, prev)
    result[i] = current
    sum += current

print(sum)

Fixed submission:

S = input()
N = len(S) + 1
result = [ -1 for i in range(N) ]

def countContinueChar(index):
    startChar = S[index]
    count = 0
    for i in range(index, N-1):
        if S[i] != startChar:
            break
        count += 1
    return count

def getValueOfIndex(index, current, prev = '', preprev = ''):
    if S[index] == '<':
        if prev == '>':
            return 0
        else:
            return current + 1
    else:
        if prev == '<':
            v = countContinueChar(index)
            if v < current + 1:
                return current + 1
            else:
                return v
        else:
            if preprev == '<' and prev == '>':
                return countContinueChar(index)
            else:
                if prev != '>':
                    return countContinueChar(index)
                else:
                    return current - 1

current = -1
prev = ''
preprev = ''
sum = 0
for i in range(N):
    if i == N-1:
        if S[-1] == '<':
            result[i] = current + 1
            sum += current + 1
        #else:
            #result[i] = 0
        break
    if i > 0:
        prev = S[i - 1]
    if i > 1:
        preprev = S[i - 2]
    current = getValueOfIndex(i, current, prev, preprev)
    #result[i] = current
    sum += current

#print(result)
print(sum)

Buggy python submission (verdict: Time Limit Exceeded):

S = input()
N = len(S) + 1
settingIndex = 0
result = [ -1 for i in range(N) ]

def countContinueChar(slice):
    startChar = slice[0]
    count = 0
    for c in slice:
        if c != startChar:
            break
        count += 1
    return count

def getValueOfIndex(slice, current, prev = ''):
    if slice[0] == '<':
        if prev == '>':
            return 0
        else:
            return current + 1
    else:
        if prev == '<':
            v = countContinueChar(slice)
            if v < current + 1:
                return current + 1
            else:
                return v
        else:
            return countContinueChar(slice)

current = -1
prev = ''
sum = 0
for i in range(N):
    if i == N-1:
        if S[-1] == '<':
            result[i] = current + 1
            sum += current + 1
        else:
            result[i] = 0
        break
    if i > 0:
        prev = S[i - 1]
    current = getValueOfIndex(S[i:], current, prev)
    result[i] = current
    sum += current

print(sum)

Fixed submission:

S = input()
N = len(S) + 1
result = [ -1 for i in range(N) ]

def countContinueChar(index):
    startChar = S[index]
    count = 0
    for i in range(index, N-1):
        if S[i] != startChar:
            break
        count += 1
    return count

def getValueOfIndex(index, current, prev = '', preprev = ''):
    if S[index] == '<':
        if prev == '>':
            return 0
        else:
            return current + 1
    else:
        if prev == '<':
            v = countContinueChar(index)
            if v < current + 1:
                return current + 1
            else:
                return v
        else:
            if preprev == '<' and prev == '>':
                return countContinueChar(index)
            else:
                if prev != '>':
                    return countContinueChar(index)
                else:
                    return current - 1

current = -1
prev = ''
preprev = ''
sum = 0
for i in range(N):
    if i == N-1:
        if S[-1] == '<':
            result[i] = current + 1
            sum += current + 1
        #else:
            #result[i] = 0
        break
    if i > 0:
        prev = S[i - 1]
    if i > 1:
        preprev = S[i - 2]
    current = getValueOfIndex(i, current, prev, preprev)
    #result[i] = current
    sum += current

#print(result)
print(sum)