#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 *, char *);
int main() {
  char first_name[20];
  char last_name[20];
  printf("Введите Имя и Фамилию: ");
  scanf("%19s %19s", first_name, last_name);
  printf("Вы ввели: %s %s\n", last_name, first_name);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x20(%rbp),%rsi
lea    -0x40(%rbp),%rdx
lea    0xede(%rip),%rdi
call   1040 <scanf@plt>
lea    -0x40(%rbp),%rsi
lea    -0x20(%rbp),%rdx
lea    0xed4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x38,%rsp
lea    0xed2(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeee(%rip),%rdi
lea    0x20(%rsp),%r14
mov    %rsp,%rbx
mov    %r14,%rsi
mov    %rbx,%rdx
call   1040 <scanf@plt>
lea    0xede(%rip),%rdi
mov    %rbx,%rsi
mov    %r14,%rdx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x38,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [42 x i8] c"\D0\92\D0\B2\D0\B5\D0\B4\D0\B8\D1\82\D0\B5 \D0\98\D0\BC\D1\8F \D0\B8 \D0\A4\D0\B0\D0\BC\D0\B8\D0\BB\D0\B8\D1\8E: \00"
@.str.1 = [10 x i8] c"%19s %19s\00"
@.str.2 = [24 x i8] c"\D0\92\D1\8B \D0\B2\D0\B2\D0\B5\D0\BB\D0\B8: %s %s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [20 x i8]
%3 = alloca [20 x i8]
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str, i64 0, i64 0))
%5 = getelementptr inbounds [20 x i8], [20 x i8]* %2, i64 0, i64 0
%6 = getelementptr inbounds [20 x i8], [20 x i8]* %3, i64 0, i64 0
%7 = call i32 @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i8* %5, i8* %6)
%8 = getelementptr inbounds [20 x i8], [20 x i8]* %3, i64 0, i64 0
%9 = getelementptr inbounds [20 x i8], [20 x i8]* %2, i64 0, i64 0
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i8* %8, i8* %9)
ret i32 0
}

LLVM IR (-O2):
@.str = [42 x i8] c"\D0\92\D0\B2\D0\B5\D0\B4\D0\B8\D1\82\D0\B5 \D0\98\D0\BC\D1\8F \D0\B8 \D0\A4\D0\B0\D0\BC\D0\B8\D0\BB\D0\B8\D1\8E: \00"
@.str.1 = [10 x i8] c"%19s %19s\00"
@.str.2 = [24 x i8] c"\D0\92\D1\8B \D0\B2\D0\B2\D0\B5\D0\BB\D0\B8: %s %s\0A\00"
define i32 @main() {
%1 = alloca [20 x i8]
%2 = alloca [20 x i8]
%3 = getelementptr inbounds [20 x i8], [20 x i8]* %1, i64 0, i64 0
%4 = getelementptr inbounds [20 x i8], [20 x i8]* %2, i64 0, i64 0
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([42 x i8], [42 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i8* %3, i8* %4)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i8* %4, i8* %3)
ret i32 0
}