#!/bin/python3

import sys
from pprint import pprint

input_f = sys.argv[1]

result = 0
arr = []
l = 101
for i in range(0,l):
    arr.append([])
    for j in range(0,l):
        arr[i].append('O')

start=int((l-1)/2)

X = start
Y = start

rX = start
rY = start

with open(input_f) as file:
    for line in file:
        tmp = list(line.rstrip())
        arr[X][Y] = 'X'
        arr[rX][rY] = 'X'
        for idx,i in enumerate(tmp):
            if idx % 2 == 0:
                if i == '^':
                    Y -= 1
                if i == '>':
                    X += 1
                if i == '<':
                    X -= 1
                if i == 'v':
                    Y += 1
            else:
                if i == '^':
                    rY -= 1
                if i == '>':
                    rX += 1
                if i == '<':
                    rX -= 1
                if i == 'v':
                    rY += 1

            arr[X][Y] = 'X'
            arr[rX][rY] = 'X'

for idx,i in enumerate(arr):
    for jdx,j in enumerate(i):
        if arr[idx][jdx] == 'X':
            result += 1
print(result)