CSES - Datatähti 2018 alku

Submission details
Task:	Bittijono
Sender:	ollpu
Submission time:	2017-10-10 21:54:55 +0300
Language:	Assembly
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	7
#2	ACCEPTED	15
#3	ACCEPTED	27
#4	ACCEPTED	51

Test results
test	verdict	time	group
#1	ACCEPTED	0.06 s	1	details
#2	ACCEPTED	0.06 s	1	details
#3	ACCEPTED	0.05 s	1	details
#4	ACCEPTED	0.04 s	1	details
#5	ACCEPTED	0.03 s	1	details
#6	ACCEPTED	0.05 s	1	details
#7	ACCEPTED	0.06 s	1	details
#8	ACCEPTED	0.04 s	1	details
#9	ACCEPTED	0.04 s	1	details
#10	ACCEPTED	0.04 s	1	details
#11	ACCEPTED	0.06 s	2	details
#12	ACCEPTED	0.05 s	2	details
#13	ACCEPTED	0.05 s	2	details
#14	ACCEPTED	0.04 s	2	details
#15	ACCEPTED	0.05 s	2	details
#16	ACCEPTED	0.05 s	2	details
#17	ACCEPTED	0.07 s	2	details
#18	ACCEPTED	0.05 s	2	details
#19	ACCEPTED	0.05 s	2	details
#20	ACCEPTED	0.06 s	2	details
#21	ACCEPTED	0.06 s	3	details
#22	ACCEPTED	0.05 s	3	details
#23	ACCEPTED	0.06 s	3	details
#24	ACCEPTED	0.04 s	3	details
#25	ACCEPTED	0.05 s	3	details
#26	ACCEPTED	0.04 s	3	details
#27	ACCEPTED	0.05 s	3	details
#28	ACCEPTED	0.05 s	3	details
#29	ACCEPTED	0.05 s	3	details
#30	ACCEPTED	0.05 s	3	details
#31	ACCEPTED	0.05 s	4	details
#32	ACCEPTED	0.08 s	4	details
#33	ACCEPTED	0.06 s	4	details
#34	ACCEPTED	0.09 s	4	details
#35	ACCEPTED	0.08 s	4	details
#36	ACCEPTED	0.07 s	4	details
#37	ACCEPTED	0.12 s	4	details
#38	ACCEPTED	0.09 s	4	details
#39	ACCEPTED	0.09 s	4	details
#40	ACCEPTED	0.11 s	4	details

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

Datatähti 2018 alku

Bittijono

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Test 26

Test 27

Test 28

Test 29

Test 30

Test 31

Test 32

Test 33

Test 34

Test 35

Test 36

Test 37

Test 38

Test 39

Test 40

Tasks

Submissions (ollpu)