idz2_for4

    .intel_syntax noprefix
    .text
    .section    .rodata
.LC0:
    .string "%lld"
.LC1:
    .string "%c"
    .text
    .globl  main
    .type   main, @function
main:
    push    rbp
    mov rbp, rsp
    sub rsp, 64
    mov QWORD PTR -40[rbp], 0 # rbp-40 is n
    lea rsi, -40[rbp]
    lea rdi, .LC0[rip]
    mov eax, 0
    call    __isoc99_scanf@PLT
    mov rax, QWORD PTR -40[rbp] # rax = n
    add rax, 1 # rax = n+1
    mov rdi, rax # malloc argument is n+1 - the size of the string s in bytes
    call    malloc@PLT
    mov QWORD PTR -16[rbp], rax # rbp-16 = s
    mov QWORD PTR -32[rbp], 0 # p1(?)
        cmp     QWORD PTR -40[rbp], 1
        jne     .L16
        mov     QWORD PTR -32[rbp], rax
.L16:
    add rax, QWORD PTR -40[rbp] # rax = s + n #-40
    mov QWORD PTR -24[rbp], rax # rbp-24 = p2 = s + n
    call    getchar@PLT
    mov DWORD PTR -52[rbp], 0 # rbp-52 = i = 0
    jmp .L2
.L3:
    movsx   rdx, DWORD PTR -52[rbp]
    mov rsi, QWORD PTR -16[rbp]
    add rsi, rdx # s + i
    lea rdi, .LC1[rip] # format string
    mov eax, 0
    call    __isoc99_scanf@PLT
    inc DWORD PTR -52[rbp]
.L2:
    movsx   rdx, DWORD PTR -52[rbp]
    cmp rdx, QWORD PTR -40[rbp]
    jl  .L3
    mov rax, QWORD PTR -40[rbp]
    dec eax
    mov DWORD PTR -48[rbp], eax # rbp-48 = i = n-1
    jmp .L4
.L9:
    mov eax, DWORD PTR -48[rbp]
    lea rdx, -1[rax]
    mov rax, QWORD PTR -16[rbp] # rax = s
    add rax, rdx
    movzx   edx, BYTE PTR [rax]# edx = s[i-1]
    mov eax, DWORD PTR -48[rbp]
    movsx   rcx, eax
    mov rax, QWORD PTR -16[rbp]
    add rax, rcx
    movzx   eax, BYTE PTR [rax] # rax = s[i]
    cmp dl, al # if (s[i - 1] < s[i])
    jge .L5
    mov eax, DWORD PTR -48[rbp]
    cdqe
    lea rdx, -1[rax]
    mov rax, QWORD PTR -16[rbp]
    add rax, rdx
    mov QWORD PTR -32[rbp], rax # p1 = s + i - 1
    jmp .L6
.L5: # else
    cmp QWORD PTR -32[rbp], 0 # if (p1 != NULL)
    jne .L8 # break
    mov eax, DWORD PTR -48[rbp]
    movsx   rdx, eax
    mov rax, QWORD PTR -16[rbp]
    add rax, rdx
    mov QWORD PTR -24[rbp], rax # p2 = s + i
.L6:
    sub DWORD PTR -48[rbp], 1 # --i
.L4:
    cmp DWORD PTR -48[rbp], 0
    jg  .L9
.L8:
        cmp      QWORD PTR -32[rbp], 0
        je      .L15
    mov DWORD PTR -44[rbp], 0 # i = 0
    jmp .L10
.L11:
    mov eax, DWORD PTR -44[rbp]
    movsx   rdx, eax
    mov rax, QWORD PTR -32[rbp]
    add rax, rdx
    movzx   eax, BYTE PTR [rax]
    movsx   eax, al
    mov edi, eax # arg=p1[i]
    call    putchar@PLT # putchar=printf("%c",...)
    add DWORD PTR -44[rbp], 1
.L10:
    mov eax, DWORD PTR -44[rbp]
    movsx   rdx, eax
    mov rax, QWORD PTR -32[rbp]
    add rax, rdx
    cmp QWORD PTR -24[rbp], rax
    jne .L11
.L15:
    mov eax, 0
    leave
    ret
    .size   main, .-main