148B - Escape - CodeForces Solution

vp = int(input())
vd = int(input())
t = int(input())
f = int(input())
c = int(input())

ans = 0

if vp >= vd:
    print(0)
else:
    dist = vp*t + ((vp*t)/(vd-vp))*vp
    while dist < c:
        "drop"
                ans += 1
        "dragon goes back and waits"
        dist += vp*(dist/vd) + f*vp
        "catches up again"
        dist += (dist/(vd-vp))*vp
    print(ans)