import math

ter = open("map.txt","r")
xpos = 0 #current x position
ypos = 0 #current y position
down = 1 #how many down
right = 3 #how many right
lines = [] #list of all the lines of the map
trees = 0 #amount of trees detected

for line in ter: #do loop for line in file
    lines.append(line.strip()) #make list of all the lines of the map

for i in range(math.floor(len(lines)/down)): #do loop the amount of lines divided by how many down (rounded down)
    if (lines[ypos])[xpos] == "#": #if "tree" detected
        trees += 1 #add tree to the amount
    xpos += right #add to the x position
    ypos += down #add to the y position
    if xpos >= len(lines[i]): #if x position is greater or same as the length of one map line
        xpos = xpos-len(lines[i]) #subtract length of one map line from x position
print(trees,"trees")