Altitude = [ [206,205,204,190,208],
             [190,194,206,197,203],
             [196,196,205,201,193],
             [194,199,199,206,205],
             [192,196,195,201,193],
             [194,199,200,200,205],
             [196,196,195,200,193] ]

from numpy import sqrt
def distance(altitude, side, p1, p2):
    r1 = p1[0]
    r2 = p2[0]
    c1 = p1[1]
    c2 = p2[1]
    w = side
    a1 = altitudes [p1[0]][p1[1]]
    a2= altitudes [p2[0]][p2[1]]
    d =sqrt((w*(r1 - r2))**2+ (w*(c1-c2))**2 + (a1-a2)**2)
    return d

def traveled_distance (altitude, side, path):
    dist = 0
    for v in range(len(path)-1):
            dist = dist + distance(altitude, side, path[v], path[v+1])
    return dist

def climb_north (altitude, start_point):
    alt_north = 0
    for a in altitude (...)

def neighbours(altitude, cell):

def higher_neighbour(altitude, cell):

def climb_higher (altitude, cell)