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Datatähti 2018 alku

Start:2017-10-02 00:00:00
End:2017-10-16 00:00:00
 

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CSES - Datatähti 2018 alku - Results
History
2017-10-10 21:54:55100
2017-10-10 21:53:57
2017-10-10 21:43:55
2017-10-02 23:37:42100
Task:Bittijono
Sender:ollpu
Submission time:2017-10-10 21:54:55
Language:Assembly
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED7
#2ACCEPTED15
#3ACCEPTED27
#4ACCEPTED51

Test results

testverdicttime (s)group
#1ACCEPTED0.06 / 1.001details
#2ACCEPTED0.06 / 1.001details
#3ACCEPTED0.05 / 1.001details
#4ACCEPTED0.04 / 1.001details
#5ACCEPTED0.03 / 1.001details
#6ACCEPTED0.05 / 1.001details
#7ACCEPTED0.06 / 1.001details
#8ACCEPTED0.04 / 1.001details
#9ACCEPTED0.04 / 1.001details
#10ACCEPTED0.04 / 1.001details
#11ACCEPTED0.06 / 1.002details
#12ACCEPTED0.05 / 1.002details
#13ACCEPTED0.05 / 1.002details
#14ACCEPTED0.04 / 1.002details
#15ACCEPTED0.05 / 1.002details
#16ACCEPTED0.05 / 1.002details
#17ACCEPTED0.07 / 1.002details
#18ACCEPTED0.05 / 1.002details
#19ACCEPTED0.05 / 1.002details
#20ACCEPTED0.06 / 1.002details
#21ACCEPTED0.06 / 1.003details
#22ACCEPTED0.05 / 1.003details
#23ACCEPTED0.06 / 1.003details
#24ACCEPTED0.04 / 1.003details
#25ACCEPTED0.05 / 1.003details
#26ACCEPTED0.04 / 1.003details
#27ACCEPTED0.05 / 1.003details
#28ACCEPTED0.05 / 1.003details
#29ACCEPTED0.05 / 1.003details
#30ACCEPTED0.05 / 1.003details
#31ACCEPTED0.05 / 1.004details
#32ACCEPTED0.08 / 1.004details
#33ACCEPTED0.06 / 1.004details
#34ACCEPTED0.09 / 1.004details
#35ACCEPTED0.08 / 1.004details
#36ACCEPTED0.07 / 1.004details
#37ACCEPTED0.12 / 1.004details
#38ACCEPTED0.09 / 1.004details
#39ACCEPTED0.09 / 1.004details
#40ACCEPTED0.11 / 1.004details

Code

; assembly korvaa rubyn, eikö?


section	.bss
input resb 10
output resb 50
A resb 2000000
B resb 2000000

section	.text
global	_start
_start:
  ; Read and parse input
  mov rax, 0
  mov rdi, 0
  mov rsi, input
  mov rdx, 10
  syscall
  
  call parse
  
  ; rdi = rax/2+rax%2
  mov rdi, rax
  shr rdi, 1
  mov rsi, 1
  and rsi, rax
  add rdi, rsi
  
  call solve
  
  mov rax, 1
  mov rdi, 1
  ; rsi and rdx retained from solve
  ; Swap rdx <-> rsi
  xor rdx, rsi
  xor rsi, rdx
  xor rdx, rsi
  syscall
  
  ; Exit
  mov rax, 60
  mov rdi, 0
  syscall

parse:
  mov rax, 0
  mov rdi, input
  mov rsi, 0
  .loop:
    mov sil, [rdi]
    sub rsi, '0' 
    cmp rsi, 0
    jl .done
    cmp rsi, 9
    jg .done
    mov rdx, 10
    imul rax, rdx
    add rax, rsi
    inc rdi
    jmp .loop
  .done:
    ret

solve:
  ; rax = n, rdi = n/2+n%2
  ; Fill A and B
  mov rsi, 0
  .fill_loop:
    mov rbx, A
    mov [rbx + rsi*4], eax
    mov rbx, B
    mov [rbx + rsi*4], esi
    inc rsi
    ; if rsi < rdi: continue
    cmp rsi, rdi
    jl .fill_loop
  ; Iterate until some m bit string ends
  .iterate:
    mov rsi, 0
    .it_loop:
      mov rbx, A
      mov ecx, [rbx + rsi*4]
      mov rbx, B
      mov edx, [rbx + rsi*4]
      mov rbp, rcx
      shr rbp, 1
      cmp rdx, rbp
      jg .it_greater
      .it_less:
        sub rcx, rdx
        dec rcx
        jmp .it_over
      .it_greater:
        mov rbx, rdx
        mov rdx, rcx
        sub rdx, rbx
        mov rcx, rbx
        dec rcx
      .it_over:
      cmp rcx, 0
      jne .skip
      cmp rdx, 0
      je .iterate_over
      .skip:
      mov rbx, A
      mov [rbx + rsi*4], ecx
      mov rbx, B
      mov [rbx + rsi*4], edx
      inc rsi
      cmp rsi, rdi
      jl .it_loop
    jmp .iterate
  .iterate_over:
  ; rsi contains optimal m
  mov rbx, rsi
  mov rsi, 0 ; string index
  mov rcx, 0 ; current bit
  .result_loop:
    mov rbp, rax
    shr rbp, 1
    cmp rbx, rbp
    jg .rs_greater
    .rs_less:
      sub rax, rbx
      dec rax
      jmp .rs_over
    .rs_greater:
      mov rdx, rbx
      mov rbx, rax
      sub rbx, rdx
      mov rax, rdx
      dec rax
      xor rcx, 1
    .rs_over:
    add rcx, '0'
    mov rdx, output
    mov [rdx + rsi], cl
    sub rcx, '0'
    inc rsi
    cmp rax, 0
    jg .result_loop
  mov rdx, output
  mov [rdx + rsi], byte `\n`
  inc rsi
  ret

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
1
view   save

correct output
1
view   save

user output
0
view   save

Test 2

Group: 1

Verdict: ACCEPTED

input
2
view   save

correct output
11
view   save

user output
00
view   save

Test 3

Group: 1

Verdict: ACCEPTED

input
3
view   save

correct output
10
view   save

user output
01
view   save

Test 4

Group: 1

Verdict: ACCEPTED

input
4
view   save

correct output
1111
view   save

user output
0000
view   save

Test 5

Group: 1

Verdict: ACCEPTED

input
5
view   save

correct output
110
view   save

user output
001
view   save

Test 6

Group: 1

Verdict: ACCEPTED

input
6
view   save

correct output
101
view   save

user output
010
view   save

Test 7

Group: 1

Verdict: ACCEPTED

input
7
view   save

correct output
1110
view   save

user output
0001
view   save

Test 8

Group: 1

Verdict: ACCEPTED

input
8
view   save

correct output
1100
view   save

user output
0011
view   save

Test 9

Group: 1

Verdict: ACCEPTED

input
9
view   save

correct output
1101
view   save

user output
0010
view   save

Test 10

Group: 1

Verdict: ACCEPTED

input
10
view   save

correct output
1001
view   save

user output
0110
view   save

Test 11

Group: 2

Verdict: ACCEPTED

input
38
view   save

correct output
1101011
view   save

user output
0010100
view   save

Test 12

Group: 2

Verdict: ACCEPTED

input
13
view   save

correct output
11011
view   save

user output
00100
view   save

Test 13

Group: 2

Verdict: ACCEPTED

input
90
view   save

correct output
111001010
view   save

user output
000110101
view   save

Test 14

Group: 2

Verdict: ACCEPTED

input
25
view   save

correct output
110010
view   save

user output
001101
view   save

Test 15

Group: 2

Verdict: ACCEPTED

input
82
view   save

correct output
111001101
view   save

user output
000110010
view   save

Test 16

Group: 2

Verdict: ACCEPTED

input
94
view   save

correct output
1100011110
view   save

user output
0011100001
view   save

Test 17

Group: 2

Verdict: ACCEPTED

input
100
view   save

correct output
1111001001
view   save

user output
0000110110
view   save

Test 18

Group: 2

Verdict: ACCEPTED

input
99
view   save

correct output
110010010
view   save

user output
001101101
view   save

Test 19

Group: 2

Verdict: ACCEPTED

input
98
view   save

correct output
110110010
view   save

user output
001001101
view   save

Test 20

Group: 2

Verdict: ACCEPTED

input
92
view   save

correct output
100110001
view   save

user output
011001110
view   save

Test 21

Group: 3

Verdict: ACCEPTED

input
1666
view   save

correct output
101101100100101
view   save

user output
010010011011010
view   save

Test 22

Group: 3

Verdict: ACCEPTED

input
897
view   save

correct output
11101001101010
view   save

user output
00010110010101
view   save

Test 23

Group: 3

Verdict: ACCEPTED

input
4466
view   save

correct output
111101010110100101
view   save

user output
000010101001011010
view   save

Test 24

Group: 3

Verdict: ACCEPTED

input
4240
view   save

correct output
11011001011010101
view   save

user output
00100110100101010
view   save

Test 25

Group: 3

Verdict: ACCEPTED

input
3089
view   save

correct output
1011001010100101
view   save

user output
0100110101011010
view   save

Test 26

Group: 3

Verdict: ACCEPTED

input
4697
view   save

correct output
11010101101010110
view   save

user output
00101010010101001
view   save

Test 27

Group: 3

Verdict: ACCEPTED

input
4608
view   save

correct output
11010110101001010
view   save

user output
00101001010110101
view   save

Test 28

Group: 3

Verdict: ACCEPTED

input
4625
view   save

correct output
111011001100101001
view   save

user output
000100110011010110
view   save

Test 29

Group: 3

Verdict: ACCEPTED

input
4611
view   save

correct output
11010101010101100
view   save

user output
00101010101010011
view   save

Test 30

Group: 3

Verdict: ACCEPTED

input
4917
view   save

correct output
10110100101010110
view   save

user output
01001011010101001
view   save

Test 31

Group: 4

Verdict: ACCEPTED

input
178555
view   save

correct output
1011010110110101010110110
view   save

user output
0100101001001010101001001
view   save

Test 32

Group: 4

Verdict: ACCEPTED

input
864856
view   save

correct output
10111010110110100100101010010
view   save

user output
01000101001001011011010101101
view   save

Test 33

Group: 4

Verdict: ACCEPTED

input
112146
view   save

correct output
1101110101011001100100110
view   save

user output
0010001010100110011011001
view   save

Test 34

Group: 4

Verdict: ACCEPTED

input
741124
view   save

correct output
1011010011010101100101011010
view   save

user output
0100101100101010011010100101
view   save

Test 35

Group: 4

Verdict: ACCEPTED

input
511902
view   save

correct output
1011010100011010100101001110
view   save

user output
0100101011100101011010110001
view   save

Test 36

Group: 4

Verdict: ACCEPTED

input
920019
view   save

correct output
11100100101101010101001101010
view   save

user output
00011011010010101010110010101
view   save

Test 37

Group: 4

Verdict: ACCEPTED

input
933943
view   save

correct output
10101011010100100110100111001
view   save

user output
01010100101011011001011000110
view   save

Test 38

Group: 4

Verdict: ACCEPTED

input
973410
view   save

correct output
1011010101011010101010101001
view   save

user output
0100101010100101010101010110
view   save

Test 39

Group: 4

Verdict: ACCEPTED

input
954943
view   save

correct output
10110110010011010100100110101
view   save

user output
01001001101100101011011001010
view   save

Test 40

Group: 4

Verdict: ACCEPTED

input
911674
view   save

correct output
1010110010110101010101010110
view   save

user output
0101001101001010101010101001
view   save