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

```c
#include<stdio.h>
int main()
{
  char c[2];
  int right,left;
  int count;
  int target;
  int n;
  while(1)
    {
      scanf("%d\n",&n);
      if(n==0) break;
      right=left=count=0;
      target=1;
      for(;n>0;n--)
	{
	  while(1)
	    {
	      scanf("%c",&c[0]);
	      if((c[0]=='l')||(c[0]=='r')) break;
	    }
	  while(1)
	    {
	      scanf("%c",&c[1]);
	      if((c[1]=='u')||(c[1]=='d')) break;
	    }
	  switch(c[0])
	    {
	    case 'l':
	      if((c[1]=='u')&&(left==0)) left=1;
	      if((c[1]=='d')&&(left==1)) left=0;
	      break;
	    case 'r':
	      if((c[1]=='u')&&(right==0)) right=1;
	      if((c[1]=='d')&&(right==1)) right=0;
	      break;
	    }
	  if((right==left)&&(right==target))
	    {
	      count++;
	      target=(target+1)%2;
	    }
	}
      printf("%d\n",count);
    }
  return 0;
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%c"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	leaq	.LC1(%rip), %rbx
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L13:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	jle	.L15
	xorl	%r15d, %r15d
	leaq	22(%rsp), %r12
	leaq	23(%rsp), %rbp
	xorl	%r13d, %r13d
	movl	$0, 4(%rsp)
	movl	$1, %r14d
	.p2align 4,,10
	.p2align 3
.L4:
	movq	%r12, %rsi
	movq	%rbx, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L6
	cmpb	$114, %al
	jne	.L4
	.p2align 4,,10
	.p2align 3
.L6:
	xorl	%eax, %eax
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	movzbl	23(%rsp), %eax
	cmpb	$117, %al
	sete	%dl
	cmpb	$100, %al
	je	.L16
	testb	%dl, %dl
	je	.L6
.L16:
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L8
	movzbl	%dl, %edx
	cmpb	$114, %al
	cmove	%edx, %r13d
.L10:
	cmpl	%r15d, %r13d
	jne	.L11
	cmpl	%r14d, %r13d
	jne	.L11
	addl	$1, 4(%rsp)
	xorl	$1, %r14d
.L11:
	movl	16(%rsp), %eax
	subl	$1, %eax
	movl	%eax, 16(%rsp)
	testl	%eax, %eax
	jg	.L4
.L3:
	movl	4(%rsp), %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L8:
	movzbl	%dl, %r15d
	jmp	.L10
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L30
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L15:
	.cfi_restore_state
	movl	$0, 4(%rsp)
	jmp	.L3
.L30:
	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:
```

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.
Optimized Assembly Code:

user
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%c"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	leaq	.LC1(%rip), %rbx
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L13:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	jle	.L15
	xorl	%r15d, %r15d
	leaq	22(%rsp), %r12
	leaq	23(%rsp), %rbp
	xorl	%r13d, %r13d
	movl	$0, 4(%rsp)
	movl	$1, %r14d
	.p2align 4,,10
	.p2align 3
.L4:
	movq	%r12, %rsi
	movq	%rbx, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L6
	cmpb	$114, %al
	jne	.L4
	.p2align 4,,10
	.p2align 3
.L6:
	xorl	%eax, %eax
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	movzbl	23(%rsp), %eax
	cmpb	$117, %al
	sete	%dl
	cmpb	$100, %al
	je	.L16
	testb	%dl, %dl
	je	.L6
.L16:
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L8
	movzbl	%dl, %edx
	cmpb	$114, %al
	cmove	%edx, %r13d
.L10:
	cmpl	%r15d, %r13d
	jne	.L11
	cmpl	%r14d, %r13d
	jne	.L11
	addl	$1, 4(%rsp)
	xorl	$1, %r14d
.L11:
	movl	16(%rsp), %eax
	subl	$1, %eax
	movl	%eax, 16(%rsp)
	testl	%eax, %eax
	jg	.L4
.L3:
	movl	4(%rsp), %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L8:
	movzbl	%dl, %r15d
	jmp	.L10
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L30
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L15:
	.cfi_restore_state
	movl	$0, 4(%rsp)
	jmp	.L3
.L30:
	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
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%c"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	leaq	.LC1(%rip), %rbx
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L13:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	jle	.L15
	xorl	%r15d, %r15d
	leaq	22(%rsp), %r12
	leaq	23(%rsp), %rbp
	xorl	%r13d, %r13d
	movl	$0, 4(%rsp)
	movl	$1, %r14d
	.p2align 4,,10
	.p2align 3
.L4:
	movq	%r12, %rsi
	movq	%rbx, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L6
	cmpb	$114, %al
	jne	.L4
	.p2align 4,,10
	.p2align 3
.L6:
	xorl	%eax, %eax
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	movzbl	23(%rsp), %eax
	cmpb	$117, %al
	sete	%dl
	cmpb	$100, %al
	je	.L16
	testb	%dl, %dl
	je	.L6
.L16:
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L8
	movzbl	%dl, %edx
	cmpb	$114, %al
	cmove	%edx, %r13d
.L10:
	cmpl	%r15d, %r13d
	jne	.L11
	cmpl	%r14d, %r13d
	jne	.L11
	addl	$1, 4(%rsp)
	xorl	$1, %r14d
.L11:
	movl	16(%rsp), %eax
	subl	$1, %eax
	movl	%eax, 16(%rsp)
	testl	%eax, %eax
	jg	.L4
.L3:
	movl	4(%rsp), %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L8:
	movzbl	%dl, %r15d
	jmp	.L10
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L30
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L15:
	.cfi_restore_state
	movl	$0, 4(%rsp)
	jmp	.L3
.L30:
	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:
```
```c
#include<stdio.h>
int main()
{
  char c[2];
  int right,left;
  int count;
  int target;
  int n;
  while(1)
    {
      scanf("%d\n",&n);
      if(n==0) break;
      right=left=count=0;
      target=1;
      for(;n>0;n--)
	{
	  while(1)
	    {
	      scanf("%c",&c[0]);
	      if((c[0]=='l')||(c[0]=='r')) break;
	    }
	  while(1)
	    {
	      scanf("%c",&c[1]);
	      if((c[1]=='u')||(c[1]=='d')) break;
	    }
	  switch(c[0])
	    {
	    case 'l':
	      if((c[1]=='u')&&(left==0)) left=1;
	      if((c[1]=='d')&&(left==1)) left=0;
	      break;
	    case 'r':
	      if((c[1]=='u')&&(right==0)) right=1;
	      if((c[1]=='d')&&(right==1)) right=0;
	      break;
	    }
	  if((right==left)&&(right==target))
	    {
	      count++;
	      target=(target+1)%2;
	    }
	}
      printf("%d\n",count);
    }
  return 0;
}```
Given the following C code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include<stdio.h>
int main()
{
  char c[2];
  int right,left;
  int count;
  int target;
  int n;
  while(1)
    {
      scanf("%d\n",&n);
      if(n==0) break;
      right=left=count=0;
      target=1;
      for(;n>0;n--)
	{
	  while(1)
	    {
	      scanf("%c",&c[0]);
	      if((c[0]=='l')||(c[0]=='r')) break;
	    }
	  while(1)
	    {
	      scanf("%c",&c[1]);
	      if((c[1]=='u')||(c[1]=='d')) break;
	    }
	  switch(c[0])
	    {
	    case 'l':
	      if((c[1]=='u')&&(left==0)) left=1;
	      if((c[1]=='d')&&(left==1)) left=0;
	      break;
	    case 'r':
	      if((c[1]=='u')&&(right==0)) right=1;
	      if((c[1]=='d')&&(right==1)) right=0;
	      break;
	    }
	  if((right==left)&&(right==target))
	    {
	      count++;
	      target=(target+1)%2;
	    }
	}
      printf("%d\n",count);
    }
  return 0;
}```

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.
Optimized Assembly Code:

4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd ru rd ru lu rd ld
0
 4
lu ru ld rd
0
lu ld lu ru
0
ul
10
vr lu ld rd rv rd ru lu rc kd
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd ru rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd su rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd su rd ru lu sd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt dr ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld dr su rd ru lu sd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt dr ru lu rd dl
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd ru rd ru lu rc ld
0

2
1
 2
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1

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

```c
#include<stdio.h>
int main()
{
  char c[2];
  int right,left;
  int count;
  int target;
  int n;
  while(1)
    {
      scanf("%d\n",&n);
      if(n==0) break;
      right=left=count=0;
      target=1;
      for(;n>0;n--)
	{
	  while(1)
	    {
	      scanf("%c",&c[0]);
	      if((c[0]=='l')||(c[0]=='r')) break;
	    }
	  while(1)
	    {
	      scanf("%c",&c[1]);
	      if((c[1]=='u')||(c[1]=='d')) break;
	    }
	  switch(c[0])
	    {
	    case 'l':
	      if((c[1]=='u')&&(left==0)) left=1;
	      if((c[1]=='d')&&(left==1)) left=0;
	      break;
	    case 'r':
	      if((c[1]=='u')&&(right==0)) right=1;
	      if((c[1]=='d')&&(right==1)) right=0;
	      break;
	    }
	  if((right==left)&&(right==target))
	    {
	      count++;
	      target=(target+1)%2;
	    }
	}
      printf("%d\n",count);
    }
  return 0;
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%c"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	leaq	.LC1(%rip), %rbx
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L13:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	jle	.L15
	xorl	%r15d, %r15d
	leaq	22(%rsp), %r12
	leaq	23(%rsp), %rbp
	xorl	%r13d, %r13d
	movl	$0, 4(%rsp)
	movl	$1, %r14d
	.p2align 4,,10
	.p2align 3
.L4:
	movq	%r12, %rsi
	movq	%rbx, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L6
	cmpb	$114, %al
	jne	.L4
	.p2align 4,,10
	.p2align 3
.L6:
	xorl	%eax, %eax
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	movzbl	23(%rsp), %eax
	cmpb	$117, %al
	sete	%dl
	cmpb	$100, %al
	je	.L16
	testb	%dl, %dl
	je	.L6
.L16:
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L8
	movzbl	%dl, %edx
	cmpb	$114, %al
	cmove	%edx, %r13d
.L10:
	cmpl	%r15d, %r13d
	jne	.L11
	cmpl	%r14d, %r13d
	jne	.L11
	addl	$1, 4(%rsp)
	xorl	$1, %r14d
.L11:
	movl	16(%rsp), %eax
	subl	$1, %eax
	movl	%eax, 16(%rsp)
	testl	%eax, %eax
	jg	.L4
.L3:
	movl	4(%rsp), %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L8:
	movzbl	%dl, %r15d
	jmp	.L10
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L30
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L15:
	.cfi_restore_state
	movl	$0, 4(%rsp)
	jmp	.L3
.L30:
	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:
```

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.
Optimized Assembly Code:

train
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%c"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	leaq	.LC1(%rip), %rbx
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L13:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	jle	.L15
	xorl	%r15d, %r15d
	leaq	22(%rsp), %r12
	leaq	23(%rsp), %rbp
	xorl	%r13d, %r13d
	movl	$0, 4(%rsp)
	movl	$1, %r14d
	.p2align 4,,10
	.p2align 3
.L4:
	movq	%r12, %rsi
	movq	%rbx, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L6
	cmpb	$114, %al
	jne	.L4
	.p2align 4,,10
	.p2align 3
.L6:
	xorl	%eax, %eax
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	movzbl	23(%rsp), %eax
	cmpb	$117, %al
	sete	%dl
	cmpb	$100, %al
	je	.L16
	testb	%dl, %dl
	je	.L6
.L16:
	movzbl	22(%rsp), %eax
	cmpb	$108, %al
	je	.L8
	movzbl	%dl, %edx
	cmpb	$114, %al
	cmove	%edx, %r13d
.L10:
	cmpl	%r15d, %r13d
	jne	.L11
	cmpl	%r14d, %r13d
	jne	.L11
	addl	$1, 4(%rsp)
	xorl	$1, %r14d
.L11:
	movl	16(%rsp), %eax
	subl	$1, %eax
	movl	%eax, 16(%rsp)
	testl	%eax, %eax
	jg	.L4
.L3:
	movl	4(%rsp), %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L8:
	movzbl	%dl, %r15d
	jmp	.L10
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L30
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L15:
	.cfi_restore_state
	movl	$0, 4(%rsp)
	jmp	.L3
.L30:
	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:
```