QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#184290 | #6793. Chiaki Sequence | Qingyu | RE | 0ms | 0kb | Python3 | 1.3kb | 2023-09-20 16:26:14 | 2023-09-20 16:26:15 |
answer
from bisect import bisect_left as bs
m = 10**9 + 7
m1 = m - 1
nmax = 10 ** 100
a = [0, 1, 2]
rs = {1}
r = 1
while True:
if len(a) & 1:
t = a[-1] * 2
for v in a[1:]: rs.add(t - v)
if a[-1] > nmax:
break
else:
while r in rs: r+=1
t = a[- 1] + r
r += 1
for v in a[1: -1]: rs.add(t - v)
a.append(t)
rs = sorted(rs)
rp = [((a + 1) % m, b - a - 1) for a, b in zip(rs, rs[1:]) if a + 1 < b]
def go(seed, n, d):
p2 = pow(2, n % m1, m)
aa = seed + d + 1
n %= m
end = aa * p2 - d - n - 1
ss = aa * (p2 - 1 <<1) - (d + 1) * n - ((n + 1) * n >> 1)
return end %m, ss % m
stamp = [0, 1]
info = [(0, 0, 0), (2, 2, 0)]
hm = nmax >> 1
u = 2
for l, c in rp:
u, ts = go(u, c, l)
stamp.append(stamp[-1] + c)
info.append((u, (info[-1][1] + ts) % m, l))
if stamp[-1] > hm: break
def sol(n):
h = n >> 1
k = bs(stamp, h)
if h == stamp[k]:
v = info[k]
else:
t = go(info[k - 1][0], h - stamp[k - 1], info[k][2])
v = t[0], info[k - 1][1] + t[1]
if n & 1:
return (v[1] * 3 + 1)% m
else:
return (v[1] * 3 + 1 - v[0] * 2)% m
for _ in range(input()):
print(sol(input()))
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 0
Dangerous Syscalls
input:
11 1 2 3 4 5 6 7 8 9 10 1000000000