Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>

#define len 5

int main(void) {
  int x1, x2, x3, x4, x5;
  int x[len];
  int index;
  scanf("%d%d%d%d%d", &x1, &x2, &x3, &x4, &x5);
  x[0] = x1;
  x[1] = x2;
  x[2] = x3;
  x[3] = x4;
  x[4] = x5;
  for(int i = 0; i < len; i++) {
    if(x[i] == 0) {
      index = i+1;
    }
  }
  printf("%d", index);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d%d%d%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$64, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-44(%rbp), %rdi
	leaq	-48(%rbp), %rsi
	leaq	-52(%rbp), %rcx
	leaq	-56(%rbp), %rdx
	leaq	-60(%rbp), %rax
	movq	%rdi, %r9
	movq	%rsi, %r8
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-60(%rbp), %eax
	movl	%eax, -32(%rbp)
	movl	-56(%rbp), %eax
	movl	%eax, -28(%rbp)
	movl	-52(%rbp), %eax
	movl	%eax, -24(%rbp)
	movl	-48(%rbp), %eax
	movl	%eax, -20(%rbp)
	movl	-44(%rbp), %eax
	movl	%eax, -16(%rbp)
	movl	$0, -36(%rbp)
	jmp	.L2
.L4:
	movl	-36(%rbp), %eax
	cltq
	movl	-32(%rbp,%rax,4), %eax
	testl	%eax, %eax
	jne	.L3
	movl	-36(%rbp), %eax
	addl	$1, %eax
	movl	%eax, -40(%rbp)
.L3:
	addl	$1, -36(%rbp)
.L2:
	cmpl	$4, -36(%rbp)
	jle	.L4
	movl	-40(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L6
	call	__stack_chk_fail@PLT
.L6:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
user
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d%d%d%d%d"
.LC1:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	subq	$40, %rsp
	.cfi_def_cfa_offset 48
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rcx
	leaq	8(%rsp), %rdx
	leaq	4(%rsp), %rsi
	leaq	20(%rsp), %r9
	leaq	16(%rsp), %r8
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	cmpl	$1, 8(%rsp)
	movl	$1, %edx
	adcl	$0, %edx
	movl	16(%rsp), %ecx
	movl	20(%rsp), %esi
	movl	$1, %edi
	testl	%eax, %eax
	movl	$3, %eax
	cmove	%eax, %edx
	testl	%ecx, %ecx
	movl	$4, %eax
	cmove	%eax, %edx
	testl	%esi, %esi
	movl	$5, %eax
	leaq	.LC1(%rip), %rsi
	cmove	%eax, %edx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L13
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L13:
	.cfi_restore_state
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

rule
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d%d%d%d%d"
.LC1:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	subq	$40, %rsp
	.cfi_def_cfa_offset 48
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rcx
	leaq	8(%rsp), %rdx
	leaq	4(%rsp), %rsi
	leaq	20(%rsp), %r9
	leaq	16(%rsp), %r8
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	cmpl	$1, 8(%rsp)
	movl	$1, %edx
	adcl	$0, %edx
	movl	16(%rsp), %ecx
	movl	20(%rsp), %esi
	movl	$1, %edi
	testl	%eax, %eax
	movl	$3, %eax
	cmove	%eax, %edx
	testl	%ecx, %ecx
	movl	$4, %eax
	cmove	%eax, %edx
	testl	%esi, %esi
	movl	$5, %eax
	leaq	.LC1(%rip), %rsi
	cmove	%eax, %edx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L13
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L13:
	.cfi_restore_state
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

#include <stdio.h>

#define len 5

int main(void) {
  int x1, x2, x3, x4, x5;
  int x[len];
  int index;
  scanf("%d%d%d%d%d", &x1, &x2, &x3, &x4, &x5);
  x[0] = x1;
  x[1] = x2;
  x[2] = x3;
  x[3] = x4;
  x[4] = x5;
  for(int i = 0; i < len; i++) {
    if(x[i] == 0) {
      index = i+1;
    }
  }
  printf("%d", index);
  return 0;
}

0 2 3 4 5

1
Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>

#define len 5

int main(void) {
  int x1, x2, x3, x4, x5;
  int x[len];
  int index;
  scanf("%d%d%d%d%d", &x1, &x2, &x3, &x4, &x5);
  x[0] = x1;
  x[1] = x2;
  x[2] = x3;
  x[3] = x4;
  x[4] = x5;
  for(int i = 0; i < len; i++) {
    if(x[i] == 0) {
      index = i+1;
    }
  }
  printf("%d", index);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d%d%d%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$64, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-44(%rbp), %rdi
	leaq	-48(%rbp), %rsi
	leaq	-52(%rbp), %rcx
	leaq	-56(%rbp), %rdx
	leaq	-60(%rbp), %rax
	movq	%rdi, %r9
	movq	%rsi, %r8
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-60(%rbp), %eax
	movl	%eax, -32(%rbp)
	movl	-56(%rbp), %eax
	movl	%eax, -28(%rbp)
	movl	-52(%rbp), %eax
	movl	%eax, -24(%rbp)
	movl	-48(%rbp), %eax
	movl	%eax, -20(%rbp)
	movl	-44(%rbp), %eax
	movl	%eax, -16(%rbp)
	movl	$0, -36(%rbp)
	jmp	.L2
.L4:
	movl	-36(%rbp), %eax
	cltq
	movl	-32(%rbp,%rax,4), %eax
	testl	%eax, %eax
	jne	.L3
	movl	-36(%rbp), %eax
	addl	$1, %eax
	movl	%eax, -40(%rbp)
.L3:
	addl	$1, -36(%rbp)
.L2:
	cmpl	$4, -36(%rbp)
	jle	.L4
	movl	-40(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L6
	call	__stack_chk_fail@PLT
.L6:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
train
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d%d%d%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$64, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-44(%rbp), %rdi
	leaq	-48(%rbp), %rsi
	leaq	-52(%rbp), %rcx
	leaq	-56(%rbp), %rdx
	leaq	-60(%rbp), %rax
	movq	%rdi, %r9
	movq	%rsi, %r8
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-60(%rbp), %eax
	movl	%eax, -32(%rbp)
	movl	-56(%rbp), %eax
	movl	%eax, -28(%rbp)
	movl	-52(%rbp), %eax
	movl	%eax, -24(%rbp)
	movl	-48(%rbp), %eax
	movl	%eax, -20(%rbp)
	movl	-44(%rbp), %eax
	movl	%eax, -16(%rbp)
	movl	$0, -36(%rbp)
	jmp	.L2
.L4:
	movl	-36(%rbp), %eax
	cltq
	movl	-32(%rbp,%rax,4), %eax
	testl	%eax, %eax
	jne	.L3
	movl	-36(%rbp), %eax
	addl	$1, %eax
	movl	%eax, -40(%rbp)
.L3:
	addl	$1, -36(%rbp)
.L2:
	cmpl	$4, -36(%rbp)
	jle	.L4
	movl	-40(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L6
	call	__stack_chk_fail@PLT
.L6:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
