CSES - Datatähti 2018 alku - Results
Submission details
Task:Bittijono
Sender:inkeri
Submission time:2017-10-08 20:07:37 +0300
Language:Python3
Status:READY
Result:22
Feedback
groupverdictscore
#1ACCEPTED7
#2ACCEPTED15
#30
#40
Test results
testverdicttimegroup
#1ACCEPTED0.08 s1details
#2ACCEPTED0.07 s1details
#3ACCEPTED0.07 s1details
#4ACCEPTED0.07 s1details
#5ACCEPTED0.09 s1details
#6ACCEPTED0.07 s1details
#7ACCEPTED0.08 s1details
#8ACCEPTED0.06 s1details
#9ACCEPTED0.09 s1details
#10ACCEPTED0.06 s1details
#11ACCEPTED0.08 s2details
#12ACCEPTED0.07 s2details
#13ACCEPTED0.07 s2details
#14ACCEPTED0.09 s2details
#15ACCEPTED0.06 s2details
#16ACCEPTED0.10 s2details
#17ACCEPTED0.10 s2details
#18ACCEPTED0.08 s2details
#19ACCEPTED0.08 s2details
#20ACCEPTED0.09 s2details
#21ACCEPTED0.89 s3details
#22--3details
#23--3details
#24--3details
#25--3details
#26--3details
#27--3details
#28--3details
#29--3details
#30--3details
#31--4details
#32--4details
#33--4details
#34--4details
#35--4details
#36--4details
#37--4details
#38--4details
#39--4details
#40--4details

Code

def main():
    tavoite = int(input())
    minimi = 1
    maksimi = 28
    while maksimi != minimi:
        pituus = (minimi + maksimi) // 2
        jono = (pituus//2)*"10" + (pituus%2)*"1"
        if len(alijonot(jono)) >= tavoite:
            maksimi = pituus
        else:
            minimi = pituus + 1

    i = pituus
    kaytetyt = set()
    while True:
        #format (i, 'b') muuttaa binääristringiksi (3 --> 11)
        #2**(3-1) = 100, 2**3 - 1 = 111
        #väliltä 000-011 ei tarvitse, koska 111 ja 000 määrät ovat samat
        alku = 2**(i-1)
        loppu = 2**i
        jonot = [format(j, 'b') for j in range(alku, loppu)]
        for j in range(len(jonot)):
            jono = jonot[j]
            if jono in kaytetyt:
                continue
            if len(alijonot(jono)) == tavoite:
                print(jono)
                return
            if jono[-1] == "1":
                kaytetyt.add(jono[::-1])
            else:
                #käännetään merkit miinuslaskulla (11111 - 10110 = 01001)
                #sitten peilaus: 01001 --> 10010
                kaytetyt.add(("0" + format(loppu - 1 - alku - j, 'b'))[::-1])
        i+=1

def alijonot(bittijono):
    jonot = set(["1"])
    prev0 = set()
    prev1 = set()
    for i in range(1, len(bittijono)):
        merkki = bittijono[i]
        temp = jonot.copy()
        if merkki == "0":
            jonot.update(set([jono + merkki for jono in jonot - prev0]))
            prev0 = temp
            jonot.add(merkki)
        else:
            jonot.update(set([jono + merkki for jono in jonot - prev1]))
            prev1 = temp
    return jonot

main()

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
1

correct output
1

user output
1

Test 2

Group: 1

Verdict: ACCEPTED

input
2

correct output
11

user output
11

Test 3

Group: 1

Verdict: ACCEPTED

input
3

correct output
10

user output
10

Test 4

Group: 1

Verdict: ACCEPTED

input
4

correct output
1111

user output
1111

Test 5

Group: 1

Verdict: ACCEPTED

input
5

correct output
110

user output
100

Test 6

Group: 1

Verdict: ACCEPTED

input
6

correct output
101

user output
101

Test 7

Group: 1

Verdict: ACCEPTED

input
7

correct output
1110

user output
1000

Test 8

Group: 1

Verdict: ACCEPTED

input
8

correct output
1100

user output
1100

Test 9

Group: 1

Verdict: ACCEPTED

input
9

correct output
1101

user output
1011

Test 10

Group: 1

Verdict: ACCEPTED

input
10

correct output
1001

user output
1001

Test 11

Group: 2

Verdict: ACCEPTED

input
38

correct output
1101011

user output
1101011

Test 12

Group: 2

Verdict: ACCEPTED

input
13

correct output
11011

user output
11011

Test 13

Group: 2

Verdict: ACCEPTED

input
90

correct output
111001010

user output
100100010

Test 14

Group: 2

Verdict: ACCEPTED

input
25

correct output
110010

user output
101100

Test 15

Group: 2

Verdict: ACCEPTED

input
82

correct output
111001101

user output
100010011

Test 16

Group: 2

Verdict: ACCEPTED

input
94

correct output
1100011110

user output
1000011100

Test 17

Group: 2

Verdict: ACCEPTED

input
100

correct output
1111001001

user output
1001001111

Test 18

Group: 2

Verdict: ACCEPTED

input
99

correct output
110010010

user output
100011010

Test 19

Group: 2

Verdict: ACCEPTED

input
98

correct output
110110010

user output
100111010

Test 20

Group: 2

Verdict: ACCEPTED

input
92

correct output
100110001

user output
100011001

Test 21

Group: 3

Verdict: ACCEPTED

input
1666

correct output
101101100100101

user output
100100010101010

Test 22

Group: 3

Verdict:

input
897

correct output
11101001101010

user output
(empty)

Test 23

Group: 3

Verdict:

input
4466

correct output
111101010110100101

user output
(empty)

Test 24

Group: 3

Verdict:

input
4240

correct output
11011001011010101

user output
(empty)

Test 25

Group: 3

Verdict:

input
3089

correct output
1011001010100101

user output
(empty)

Test 26

Group: 3

Verdict:

input
4697

correct output
11010101101010110

user output
(empty)

Test 27

Group: 3

Verdict:

input
4608

correct output
11010110101001010

user output
(empty)

Test 28

Group: 3

Verdict:

input
4625

correct output
111011001100101001

user output
(empty)

Test 29

Group: 3

Verdict:

input
4611

correct output
11010101010101100

user output
(empty)

Test 30

Group: 3

Verdict:

input
4917

correct output
10110100101010110

user output
(empty)

Test 31

Group: 4

Verdict:

input
178555

correct output
1011010110110101010110110

user output
(empty)

Test 32

Group: 4

Verdict:

input
864856

correct output
10111010110110100100101010010

user output
(empty)

Test 33

Group: 4

Verdict:

input
112146

correct output
1101110101011001100100110

user output
(empty)

Test 34

Group: 4

Verdict:

input
741124

correct output
1011010011010101100101011010

user output
(empty)

Test 35

Group: 4

Verdict:

input
511902

correct output
1011010100011010100101001110

user output
(empty)

Test 36

Group: 4

Verdict:

input
920019

correct output
11100100101101010101001101010

user output
(empty)

Test 37

Group: 4

Verdict:

input
933943

correct output
10101011010100100110100111001

user output
(empty)

Test 38

Group: 4

Verdict:

input
973410

correct output
1011010101011010101010101001

user output
(empty)

Test 39

Group: 4

Verdict:

input
954943

correct output
10110110010011010100100110101

user output
(empty)

Test 40

Group: 4

Verdict:

input
911674

correct output
1010110010110101010101010110

user output
(empty)