edited

    .intel_syntax noprefix
    .text
    .section    .rodata
.LC0:
    .string "%[^\n]s"
    .text
    .globl  main
    .type   main, @function
main:
    push    rbp
    mov rbp, rsp
    sub rsp, 96
    mov DWORD PTR -84[rbp], 0 # n
    mov DWORD PTR -92[rbp], 0 # cnt
    # map ->
    mov DWORD PTR -64[rbp], 73
    mov BYTE PTR -60[rbp], 0
    mov DWORD PTR -59[rbp], 18761
    mov BYTE PTR -55[rbp], 0
    mov DWORD PTR -54[rbp], 4802889
    mov BYTE PTR -50[rbp], 0
    mov DWORD PTR -49[rbp], 22089
    mov BYTE PTR -45[rbp], 0
    mov DWORD PTR -44[rbp], 86
    mov BYTE PTR -40[rbp], 0
    mov DWORD PTR -39[rbp], 18774
    mov BYTE PTR -35[rbp], 0
    mov DWORD PTR -34[rbp], 4802902
    mov BYTE PTR -30[rbp], 0
    mov DWORD PTR -29[rbp], 1229539670
    mov BYTE PTR -25[rbp], 0
    mov DWORD PTR -24[rbp], 22601
    mov BYTE PTR -20[rbp], 0
    # map <-
    mov edi, 1024
    call    malloc@PLT
    mov QWORD PTR -80[rbp], rax # dest
    mov rsi, QWORD PTR -80[rbp]
    lea rdi, .LC0[rip] # fmt string
    mov eax, 0
    call    __isoc99_scanf@PLT
    mov rdi, QWORD PTR -80[rbp]
    call    strlen@PLT #strlen(dest)
    mov DWORD PTR -84[rbp], eax # n
    mov eax, DWORD PTR -84[rbp]
    sal eax, 2
    add eax, 1
    cdqe
    mov rdi, rax # 4 * n + 1
    call    malloc@PLT
    mov QWORD PTR -72[rbp], rax # res
    mov DWORD PTR -88[rbp], 0 # i
    jmp .L2
.L3:
    mov eax, DWORD PTR -88[rbp]
    movsx   rdx, eax
    mov rax, QWORD PTR -80[rbp]
    add rax, rdx
    movzx   eax, BYTE PTR [rax]
    movsx   eax, al
    sub eax, 49
    lea rcx, -64[rbp]
    movsx   rdx, eax
    mov rax, rdx
    sal rax, 2
    add rax, rdx
    lea rdx, [rcx+rax]
    mov eax, DWORD PTR -92[rbp]
    movsx   rcx, eax
    mov rax, QWORD PTR -72[rbp]
    add rax, rcx
    mov rsi, rdx # map[dest[i] - '0' - 1]
    mov rdi, rax # res + cnt
    call    strcpy@PLT
    mov rdi, rsi # map[dest[i] - '0' - 1]
    call    strlen@PLT
    add DWORD PTR -92[rbp], eax
    add DWORD PTR -88[rbp], 1 # i++
.L2:
    mov eax, DWORD PTR -88[rbp] # i
    cmp eax, DWORD PTR -84[rbp] # n
    jl  .L3
    mov rdi, QWORD PTR -72[rbp] # res
    call    puts@PLT
    xor eax, eax
    leave
    ret
    .size   main, .-main