#!/usr/bin/python


def read_file(filename, chunk=1024):
    file = open(filename, 'r')
    while True:
        line = file.read(chunk)
        if not line:
            break
        yield line


def getFloorPlanKey(posX, posY):
    return "%dx%d" % (posX, posY)


def moveSanta(posX, posY, direction):
    if direction == '>':
        posX = posX + 1
    if direction == '<':
        posX = posX - 1
    if direction == '^':
        posY = posY + 1
    if direction == 'v':
        posY = posY - 1
    return (posX, posY)


def main():
    posX = 0
    posY = 0
    houses = 1
    floorPlan = dict()
    floorPlan[getFloorPlanKey(0, 0)] = 1

    for line in read_file('input', 1):
        (posX, posY) = moveSanta(posX, posY, line[0])
        key = getFloorPlanKey(posX, posY)

        if key not in floorPlan:
            houses = houses + 1
            floorPlan[key] = 0
        floorPlan[key] = floorPlan[key] + 1
    print houses

if __name__ == "__main__":
    main()