#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 *, int *);
int main() {
  int number, num, revnumber = 0, rem;
  scanf("%d", &number);
  num = number;
  while (num != 0) {
    rem = num % 10;
    revnumber = revnumber * 10 + rem;
    num /= 10;
  }
  if (number == revnumber) {
    printf("Is palindrome\n");
  } else
    printf("Not palindrome\n");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xec3(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
je     1181 <main+0x61>
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x14(%rbp)
imul   $0xa,-0x10(%rbp),%eax
add    -0x14(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
jmp    114c <main+0x2c>
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jne    119e <main+0x7e>
lea    0xe6f(%rip),%rdi
call   1030 <printf@plt>
jmp    11aa <main+0x8a>
lea    0xe6d(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%r8d
test   %r8d,%r8d
je     1196 <main+0x76>
xor    %edx,%edx
mov    %r8d,%ecx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
lea    (%rdx,%rdx,4),%edx
movslq %ecx,%rax
imul   $0x66666667,%rax,%rcx
mov    %rcx,%rdi
shr    $0x3f,%rdi
sar    $0x22,%rcx
add    %edi,%ecx
lea    (%rcx,%rcx,1),%edi
lea    (%rdi,%rdi,4),%edi
mov    %eax,%esi
sub    %edi,%esi
lea    (%rsi,%rdx,2),%edx
add    $0x9,%eax
cmp    $0x12,%eax
ja     1150 <main+0x30>
cmp    %edx,%r8d
lea    0xe89(%rip),%rax
lea    0xe73(%rip),%rdi
cmove  %rax,%rdi
jmp    119d <main+0x7d>
lea    0xe75(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [15 x i8] c"Is palindrome\0A\00"
@.str.2 = [16 x i8] c"Not palindrome\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %2
store i32 %7, i32* %3
br label %8
8: ; preds = %11, %0
%9 = load i32, i32* %3
%10 = icmp ne i32 %9, 0
br i1 %10, label %11, label %20
11: ; preds = %8
%12 = load i32, i32* %3
%13 = srem i32 %12, 10
store i32 %13, i32* %5
%14 = load i32, i32* %4
%15 = mul nsw i32 %14, 10
%16 = load i32, i32* %5
%17 = add nsw i32 %15, %16
store i32 %17, i32* %4
%18 = load i32, i32* %3
%19 = sdiv i32 %18, 10
store i32 %19, i32* %3
br label %8
20: ; preds = %8
%21 = load i32, i32* %2
%22 = load i32, i32* %4
%23 = icmp eq i32 %21, %22
br i1 %23, label %24, label %26
24: ; preds = %20
%25 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0))
br label %28
26: ; preds = %20
%27 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0))
br label %28
28: ; preds = %26, %24
%29 = load i32, i32* %1
ret i32 %29
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@str = [15 x i8] c"Not palindrome\00"
@str.3 = [14 x i8] c"Is palindrome\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%4 = load i32, i32* %1
%5 = icmp eq i32 %4, 0
br i1 %5, label %18, label %6
6: ; preds = %0, %6
%7 = phi i32 [ %12, %6 ], [ %4, %0 ]
%8 = phi i32 [ %11, %6 ], [ 0, %0 ]
%9 = srem i32 %7, 10
%10 = mul nsw i32 %8, 10
%11 = add nsw i32 %9, %10
%12 = sdiv i32 %7, 10
%13 = add i32 %7, 9
%14 = icmp ult i32 %13, 19
br i1 %14, label %15, label %6
15: ; preds = %6
%16 = icmp eq i32 %4, %11
%17 = select i1 %16, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @str.3, i64 0, i64 0), i8* getelementptr inbounds ([15 x i8], [15 x i8]* @str, i64 0, i64 0)
br label %18
18: ; preds = %15, %0
%19 = phi i8* [ getelementptr inbounds ([14 x i8], [14 x i8]* @str.3, i64 0, i64 0), %0 ], [ %17, %15 ]
%20 = call i32 @puts(i8* dereferenceable(1) %19)
ret i32 0
}