2022 ICPC Asia Taiwan Online Programming Contest

H. Heximal

不会高精度，拿python写的，但是python3.8会TLE，python2不会，就是有点卡

高精度+快速幂

def fp(x, y):
    ret = 1
    while y:
        if y % 2 == 1:
            ret = ret * x
        x = x * x
        y = y // 2
    return ret


s = int(input())
lll = 1
r = 1000000
ans = r
while lll <= r:
    mid = (lll + r) // 2
    t = fp(6, mid)
    if t > s:
        r = mid - 1
        ans = min(mid, ans)
    else:
        lll = mid + 1
print(ans)