CSES - Datatähti 2022 alku - Results
Submission details
Task:Ositus
Sender:Totska
Submission time:2021-10-17 19:53:49 +0300
Language:Python3 (CPython3)
Status:READY
Result:65
Feedback
groupverdictscore
#1ACCEPTED40
#2ACCEPTED25
#30
Test results
testverdicttimegroup
#1ACCEPTED0.04 s1, 2, 3details
#2ACCEPTED0.03 s1, 2, 3details
#3ACCEPTED0.03 s1, 2, 3details
#4ACCEPTED0.03 s1, 2, 3details
#5ACCEPTED0.03 s2, 3details
#6ACCEPTED0.05 s3details
#7--3details

Code

from collections import deque
from string import ascii_lowercase
from os import read
# import cProfile
#
# pr = cProfile.Profile()
# pr.enable()
s = "-" + input() + "x"
# s = ["-", read(0, 999999999).decode().strip(), "x"]
# s = ["-", input(), "x"]
# def opt_join(x):
# global s
# s = ''.join(x)
#
# opt_join(s)
# print(s)
end = len(s) - 1
maxnb = [end+1 for _ in range(end+1)]
maxnb.append(-1)
minimum = end + 1
seen = {ascii_lowercase[i]: end+1 for i in range(26)}
last = {i: -1 for i in range(end+2)}
distances = deque()
prevdist = 9999999
for i in range(end, 0, -1):
minimum = min(minimum, seen[s[i]])
if minimum < prevdist:
distances.insert(0, minimum)
prevdist = minimum
# maxnb[i] = seen[s[i]]
maxnb[i] = minimum
seen[s[i]] = i
last[maxnb[i]] = max(last[maxnb[i]], i)
def getsum(a, b):
return sumtable[b] - sumtable[a-1]
# i+1 indeksointi
sumtable = [0, 1]
start = 1
mindist = distances.popleft()
for i in range(2, end+1):
# check
if i > mindist:
start = last[mindist] + 1
mindist = distances.popleft()
sumtable.append(sumtable[i-1] + getsum(start, i-1))
MOD = 10**9 + 7
print((getsum(end, end)) % MOD)
# print(int(getval(end, -1) % MOD))
# pr.disable()
# pr.print_stats(sort='time')

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
a

correct output
1

user output
1

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
abcdefghij

correct output
512

user output
512

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
abcabaacbc

correct output
120

user output
120

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
aaxxxxxxaa

correct output
4

user output
4

Test 5

Group: 2, 3

Verdict: ACCEPTED

input
mfyzvoxmppoxcvktmcjkryyocfweub...

correct output
643221148

user output
643221148

Test 6

Group: 3

Verdict: ACCEPTED

input
weinscqmmpgbrlboocvtbptgbahmwv...

correct output
831644159

user output
831644159

Test 7

Group: 3

Verdict:

input
sxaoxcyrjoeieyinaqxwukgzdnhhsw...

correct output
816016015

user output
(empty)