#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, char **);
int strlen(char *);
int main() {
  int i, t;
  char str[1000];
  printf("Please input an integer:");
  scanf("%s", &str);
  printf("The result is:");
  for (i = 0, t = strlen(str) - 1; i < strlen(str); i++, t--)
    if (t % 3 || i == strlen(str) - 1)
      printf("%c", str[i]);
    else
      printf("%c,", str[i]);
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x410,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeb7(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x400(%rbp),%rsi
lea    0xebb(%rip),%rdi
call   1050 <scanf@plt>
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x8(%rbp)
lea    -0x400(%rbp),%rdi
call   1030 <strlen@plt>
sub    $0x1,%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x404(%rbp)
lea    -0x400(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x404(%rbp),%eax
cmp    %ecx,%eax
jge    1240 <main+0x110>
mov    -0xc(%rbp),%eax
mov    $0x3,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11eb <main+0xbb>
mov    -0x8(%rbp),%eax
mov    %eax,-0x408(%rbp)
lea    -0x400(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x408(%rbp),%eax
sub    $0x1,%ecx
cmp    %ecx,%eax
jne    120a <main+0xda>
movslq -0x8(%rbp),%rax
movsbl -0x400(%rbp,%rax,1),%esi
ff
lea    0xe2d(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
jmp    1224 <main+0xf4>
movslq -0x8(%rbp),%rax
movsbl -0x400(%rbp,%rax,1),%esi
ff
lea    0xe11(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
jmp    1229 <main+0xf9>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    118a <main+0x5a>
lea    0xdeb(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x410,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
sub    $0x3e8,%rsp
lea    0xeac(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xeb7(%rip),%rdi
mov    %rsp,%r14
mov    %r14,%rsi
call   1060 <scanf@plt>
lea    0xea8(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    %eax,%ebp
mov    %r14,%rdi
call   1040 <strlen@plt>
test   %eax,%eax
jle    1201 <main+0xc1>
add    $0xffffffff,%ebp
mov    %rsp,%r14
lea    0xe8d(%rip),%r15
xor    %ebx,%ebx
jmp    11cf <main+0x8f>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
movsbl (%rsp,%rbx,1),%edi
call   1030 <putchar@plt>
add    $0x1,%rbx
mov    %r14,%rdi
call   1040 <strlen@plt>
cltq
add    $0xffffffff,%ebp
cmp    %rax,%rbx
jge    1201 <main+0xc1>
imul   $0xaaaaaaab,%ebp,%eax
add    $0x2aaaaaaa,%eax
cmp    $0x55555554,%eax
ja     11b0 <main+0x70>
mov    %r14,%rdi
call   1040 <strlen@plt>
add    $0xffffffff,%eax
cmp    %rax,%rbx
je     11b0 <main+0x70>
movsbl (%rsp,%rbx,1),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
jmp    11b9 <main+0x79>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x3e8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Please input an integer:\00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [15 x i8] c"The result is:\00"
@.str.3 = [3 x i8] c"%c\00"
@.str.4 = [4 x i8] c"%c,\00"
@.str.5 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca [1000 x i8]
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%6 = bitcast [1000 x i8]* %4 to i8**
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %6)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %2
%9 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%10 = call i32 @strlen(i8* %9)
%11 = sub nsw i32 %10, 1
store i32 %11, i32* %3
br label %12
12: ; preds = %42, %0
%13 = load i32, i32* %2
%14 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%15 = call i32 @strlen(i8* %14)
%16 = icmp slt i32 %13, %15
br i1 %16, label %17, label %47
17: ; preds = %12
%18 = load i32, i32* %3
%19 = srem i32 %18, 3
%20 = icmp ne i32 %19, 0
br i1 %20, label %27, label %21
21: ; preds = %17
%22 = load i32, i32* %2
%23 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%24 = call i32 @strlen(i8* %23)
%25 = sub nsw i32 %24, 1
%26 = icmp eq i32 %22, %25
br i1 %26, label %27, label %34
27: ; preds = %21, %17
%28 = load i32, i32* %2
%29 = sext i32 %28 to i64
%30 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 %29
%31 = load i8, i8* %30
%32 = sext i8 %31 to i32
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32 %32)
br label %41
34: ; preds = %21
%35 = load i32, i32* %2
%36 = sext i32 %35 to i64
%37 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 %36
%38 = load i8, i8* %37
%39 = sext i8 %38 to i32
%40 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %39)
br label %41
41: ; preds = %34, %27
br label %42
42: ; preds = %41
%43 = load i32, i32* %2
%44 = add nsw i32 %43, 1
store i32 %44, i32* %2
%45 = load i32, i32* %3
%46 = add nsw i32 %45, -1
store i32 %46, i32* %3
br label %12
47: ; preds = %12
%48 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [25 x i8] c"Please input an integer:\00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [15 x i8] c"The result is:\00"
@.str.4 = [4 x i8] c"%c,\00"
define i32 @main() {
%1 = alloca [1000 x i8]
%2 = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i64 0, i64 0
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%4 = bitcast [1000 x i8]* %1 to i8**
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %4)
%6 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0))
%7 = call i32 @strlen(i8* %2)
%8 = call i32 @strlen(i8* %2)
%9 = icmp sgt i32 %8, 0
br i1 %9, label %10, label %36
10: ; preds = %0, %31
%11 = phi i64 [ %32, %31 ], [ 0, %0 ]
%12 = phi i32 [ %13, %31 ], [ %7, %0 ]
%13 = add nsw i32 %12, -1
%14 = srem i32 %13, 3
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %21
16: ; preds = %10
%17 = call i32 @strlen(i8* %2)
%18 = add nsw i32 %17, -1
%19 = zext i32 %18 to i64
%20 = icmp eq i64 %11, %19
br i1 %20, label %21, label %26
21: ; preds = %16, %10
%22 = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i64 0, i64 %11
%23 = load i8, i8* %22
%24 = sext i8 %23 to i32
%25 = call i32 @putchar(i32 %24)
br label %31
26: ; preds = %16
%27 = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i64 0, i64 %11
%28 = load i8, i8* %27
%29 = sext i8 %28 to i32
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %29)
br label %31
31: ; preds = %21, %26
%32 = add nuw nsw i64 %11, 1
%33 = call i32 @strlen(i8* %2)
%34 = sext i32 %33 to i64
%35 = icmp slt i64 %32, %34
br i1 %35, label %10, label %36
36: ; preds = %31, %0
%37 = call i32 @putchar(i32 10)
ret i32 0
}