from turtle import *
reset()   ##  Kelionė po dykumą :)

# nr:   0    1    2    3   4   5
X = [  20,  50, 100,  80,  0, -30]
Y = [-100, 100,   0, 50, 40, 50 ]
K = [  20,  40,  30 , 100, 20, 40 ] # kuras

kuras = 250

n = len(X)

up()
for i in range(n):
    goto(X[i], Y[i])
    dot(10)
    write(i)

goto(X[0], Y[0]); down()  # startas

i = 0
while i < n-1:
    kuras = kuras + K[i]
    write( [i, kuras] )

    for j in range(i+1, n):
        dx = X[i]-X[j]
        dy = Y[i]-Y[j]
        atstumas = round( (dx**2+dy**2)**0.5 )
        if atstumas < kuras:
            break

    if atstumas < kuras:
        goto(X[j], Y[j])
        i = j
        kuras = kuras - atstumas
    else:
        color('red'); dot(5); left(90); fd(20); write('BASTA')
        break

mainloop()