CSES - Datatähti 2022 alku - Results
Submission details
Task:Ositus
Sender:Totska
Submission time:2021-10-14 19:24:18 +0300
Language:PyPy3
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.05 s1, 2, 3details
#2ACCEPTED0.05 s1, 2, 3details
#30.05 s1, 2, 3details
#40.05 s1, 2, 3details
#50.06 s2, 3details
#60.11 s3details
#7--3details

Code

from collections import defaultdict

s = input()

end = len(s)
maxnb = [end for _ in range(end+1)]

def default():
    return end

def def2():
    return -1

seen = defaultdict(default)

for i in range(end-1, -1, -1):
    maxnb[i] = seen[s[i]]
    seen[s[i]] = i

val = defaultdict(def2)
val[0] = 1

def getval(cur, prev):
    if maxnb[cur] < prev:
        return 0

    if val[cur] != -1:
        return val[cur]

    ans = 0

    for i in range(0, cur):
        ans += getval(i, cur)

    val[cur] = ans

    return ans

print(getval(end, -1))

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:

input
abcabaacbc

correct output
120

user output
195

Test 4

Group: 1, 2, 3

Verdict:

input
aaxxxxxxaa

correct output
4

user output
19

Test 5

Group: 2, 3

Verdict:

input
mfyzvoxmppoxcvktmcjkryyocfweub...

correct output
643221148

user output
119275649739755038950330266124

Test 6

Group: 3

Verdict:

input
weinscqmmpgbrlboocvtbptgbahmwv...

correct output
831644159

user output
172270783869044761646841149833...

Test 7

Group: 3

Verdict:

input
sxaoxcyrjoeieyinaqxwukgzdnhhsw...

correct output
816016015

user output
(empty)