#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*/ gets(char *);
int /*<<< orphan*/ printf(char *);
scalar_t__ strcmp(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int /*<<< orphan*/ strrev(char *);
int main(void) {
  char s[100], b[100];
  gets(s);
  strcpy(b, s);
  strrev(b);
  if (strcmp(s, b) == 0)
    printf(" 1\n");
  else
    printf(" 0\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0xe0,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x70(%rbp),%rdi
call   1060 <gets@plt>
lea    -0xe0(%rbp),%rdi
lea    -0x70(%rbp),%rsi
call   1030 <strcpy@plt>
lea    -0xe0(%rbp),%rdi
call   1070 <strrev@plt>
lea    -0x70(%rbp),%rdi
lea    -0xe0(%rbp),%rsi
call   1050 <strcmp@plt>
cmp    $0x0,%rax
jne    11b2 <main+0x62>
lea    0xe58(%rip),%rdi
call   1040 <printf@plt>
jmp    11be <main+0x6e>
lea    0xe4b(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0xe0,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0xd8,%rsp
lea    0x70(%rsp),%r14
mov    %r14,%rdi
call   1060 <gets@plt>
mov    %rsp,%rbx
mov    %rbx,%rdi
mov    %r14,%rsi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1070 <strrev@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1050 <strcmp@plt>
test   %rax,%rax
lea    0xe71(%rip),%rax
lea    0xe67(%rip),%rdi
cmove  %rax,%rdi
call   1040 <puts@plt>
xor    %eax,%eax
add    $0xd8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [4 x i8] c" 1\0A\00"
@.str.1 = [4 x i8] c" 0\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [100 x i8]
%3 = alloca [100 x i8]
store i32 0, i32* %1
%4 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%5 = call i32 @gets(i8* %4)
%6 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%8 = call i32 @strcpy(i8* %6, i8* %7)
%9 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%10 = call i32 @strrev(i8* %9)
%11 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%12 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%13 = call i64 @strcmp(i8* %11, i8* %12)
%14 = icmp eq i64 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %0
%16 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
br label %19
17: ; preds = %0
%18 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
br label %19
19: ; preds = %17, %15
ret i32 0
}

LLVM IR (-O2):
@str = [3 x i8] c" 0\00"
@str.2 = [3 x i8] c" 1\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca [100 x i8]
%3 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%4 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%5 = call i32 @gets(i8* %3)
%6 = call i32 @strcpy(i8* %4, i8* %3)
%7 = call i32 @strrev(i8* %4)
%8 = call i64 @strcmp(i8* %3, i8* %4)
%9 = icmp eq i64 %8, 0
%10 = select i1 %9, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @str.2, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @str, i64 0, i64 0)
%11 = call i32 @puts(i8* dereferenceable(1) %10)
ret i32 0
}