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(){

  long long a,b;
  scanf("%lld %lld",&a,&b);
  if(b==1) printf("%lld\n",a*(a-1)/2);
  else printf("%lld\n",(a-b+3)*(a-b)/2+b-2);
  return 0;

}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%lld %lld"
.LC1:
	.string	"%lld\n"
	.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	16(%rsp), %rdx
	leaq	8(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movq	16(%rsp), %rcx
	movq	8(%rsp), %rdx
	cmpq	$1, %rcx
	je	.L7
	subq	%rcx, %rdx
	movl	$2, %esi
	movl	$1, %edi
	leaq	3(%rdx), %rax
	imulq	%rdx, %rax
	cqto
	idivq	%rsi
	leaq	.LC1(%rip), %rsi
	leaq	-2(%rcx,%rax), %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L3:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L7:
	.cfi_restore_state
	leaq	-1(%rdx), %rax
	movl	$2, %ecx
	movl	$1, %edi
	imulq	%rdx, %rax
	leaq	.LC1(%rip), %rsi
	cqto
	idivq	%rcx
	movq	%rax, %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L3
.L8:
	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	"%lld %lld"
.LC1:
	.string	"%lld\n"
	.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	16(%rsp), %rdx
	leaq	8(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movq	16(%rsp), %rcx
	movq	8(%rsp), %rdx
	cmpq	$1, %rcx
	je	.L7
	subq	%rcx, %rdx
	movl	$2, %esi
	movl	$1, %edi
	leaq	3(%rdx), %rax
	imulq	%rdx, %rax
	cqto
	idivq	%rsi
	leaq	.LC1(%rip), %rsi
	leaq	-2(%rcx,%rax), %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L3:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L7:
	.cfi_restore_state
	leaq	-1(%rdx), %rax
	movl	$2, %ecx
	movl	$1, %edi
	imulq	%rdx, %rax
	leaq	.LC1(%rip), %rsi
	cqto
	idivq	%rcx
	movq	%rax, %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L3
.L8:
	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	"%lld %lld"
.LC1:
	.string	"%lld\n"
	.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	16(%rsp), %rdx
	leaq	8(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movq	16(%rsp), %rcx
	movq	8(%rsp), %rdx
	cmpq	$1, %rcx
	je	.L7
	subq	%rcx, %rdx
	movl	$2, %esi
	movl	$1, %edi
	leaq	3(%rdx), %rax
	imulq	%rdx, %rax
	cqto
	idivq	%rsi
	leaq	.LC1(%rip), %rsi
	leaq	-2(%rcx,%rax), %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L3:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L7:
	.cfi_restore_state
	leaq	-1(%rdx), %rax
	movl	$2, %ecx
	movl	$1, %edi
	imulq	%rdx, %rax
	leaq	.LC1(%rip), %rsi
	cqto
	idivq	%rcx
	movq	%rax, %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L3
.L8:
	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(){

  long long a,b;
  scanf("%lld %lld",&a,&b);
  if(b==1) printf("%lld\n",a*(a-1)/2);
  else printf("%lld\n",(a-b+3)*(a-b)/2+b-2);
  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(){

  long long a,b;
  scanf("%lld %lld",&a,&b);
  if(b==1) printf("%lld\n",a*(a-1)/2);
  else printf("%lld\n",(a-b+3)*(a-b)/2+b-2);
  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:

0 1
 4 5
 6 5
 0 2
 4 1
 -1 1
 6 9
 0 8
 8 1
 6 3

0
 2
 5
 -1
 6
 1
 7
 26
 28
 10

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(){

  long long a,b;
  scanf("%lld %lld",&a,&b);
  if(b==1) printf("%lld\n",a*(a-1)/2);
  else printf("%lld\n",(a-b+3)*(a-b)/2+b-2);
  return 0;

}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%lld %lld"
.LC1:
	.string	"%lld\n"
	.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	16(%rsp), %rdx
	leaq	8(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movq	16(%rsp), %rcx
	movq	8(%rsp), %rdx
	cmpq	$1, %rcx
	je	.L7
	subq	%rcx, %rdx
	movl	$2, %esi
	movl	$1, %edi
	leaq	3(%rdx), %rax
	imulq	%rdx, %rax
	cqto
	idivq	%rsi
	leaq	.LC1(%rip), %rsi
	leaq	-2(%rcx,%rax), %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L3:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L7:
	.cfi_restore_state
	leaq	-1(%rdx), %rax
	movl	$2, %ecx
	movl	$1, %edi
	imulq	%rdx, %rax
	leaq	.LC1(%rip), %rsi
	cqto
	idivq	%rcx
	movq	%rax, %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L3
.L8:
	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	"%lld %lld"
.LC1:
	.string	"%lld\n"
	.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	16(%rsp), %rdx
	leaq	8(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movq	16(%rsp), %rcx
	movq	8(%rsp), %rdx
	cmpq	$1, %rcx
	je	.L7
	subq	%rcx, %rdx
	movl	$2, %esi
	movl	$1, %edi
	leaq	3(%rdx), %rax
	imulq	%rdx, %rax
	cqto
	idivq	%rsi
	leaq	.LC1(%rip), %rsi
	leaq	-2(%rcx,%rax), %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L3:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	xorl	%eax, %eax
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 8
	ret
.L7:
	.cfi_restore_state
	leaq	-1(%rdx), %rax
	movl	$2, %ecx
	movl	$1, %edi
	imulq	%rdx, %rax
	leaq	.LC1(%rip), %rsi
	cqto
	idivq	%rcx
	movq	%rax, %rdx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L3
.L8:
	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:
```