#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*/ phi(long long);
int /*<<< orphan*/ printf(char *, int /*<<< orphan*/);
scalar_t__ scanf(char *, long long *);
int main() {
  long long int n, m;
  while (scanf("%lld", &n) && n) {
    printf("%lld\n", phi(n));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <scanf@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    $0x0,%rcx
mov    %al,-0x19(%rbp)
je     116c <main+0x3c>
cmpq   $0x0,-0x10(%rbp)
setne  %al
mov    %al,-0x19(%rbp)
mov    -0x19(%rbp),%al
test   $0x1,%al
jne    117c <main+0x4c>
jmp    1198 <main+0x68>
mov    -0x10(%rbp),%rdi
call   1040 <phi@plt>
mov    %eax,%esi
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
jmp    113f <main+0xf>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xec0(%rip),%rdi
lea    0x8(%rsp),%rsi
call   1050 <scanf@plt>
test   %rax,%rax
je     1199 <main+0x69>
mov    0x8(%rsp),%rdi
test   %rdi,%rdi
je     1199 <main+0x69>
lea    0xea5(%rip),%r14
lea    0xe99(%rip),%r15
lea    0x8(%rsp),%rbx
nopl   0x0(%rax)
call   1040 <phi@plt>
mov    %r14,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
test   %rax,%rax
je     1199 <main+0x69>
mov    0x8(%rsp),%rdi
test   %rdi,%rdi
jne    1170 <main+0x40>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [5 x i8] c"%lld\00"
@.str.1 = [6 x i8] c"%lld\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i64
%3 = alloca i64
store i32 0, i32* %1
br label %4
4: ; preds = %12, %0
%5 = call i64 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64* %2)
%6 = icmp ne i64 %5, 0
br i1 %6, label %7, label %10
7: ; preds = %4
%8 = load i64, i64* %2
%9 = icmp ne i64 %8, 0
br label %10
10: ; preds = %7, %4
%11 = phi i1 [ false, %4 ], [ %9, %7 ]
br i1 %11, label %12, label %16
12: ; preds = %10
%13 = load i64, i64* %2
%14 = call i32 @phi(i64 %13)
%15 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %14)
br label %4
16: ; preds = %10
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"%lld\00"
@.str.1 = [6 x i8] c"%lld\0A\00"
define i32 @main() {
%1 = alloca i64
%2 = bitcast i64* %1 to i8*
%3 = call i64 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64* %1)
%4 = icmp ne i64 %3, 0
%5 = load i64, i64* %1
%6 = icmp ne i64 %5, 0
%7 = select i1 %4, i1 %6, i1 false
br i1 %7, label %8, label %17
8: ; preds = %0, %8
%9 = phi i64 [ %14, %8 ], [ %5, %0 ]
%10 = call i32 @phi(i64 %9)
%11 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %10)
%12 = call i64 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64* %1)
%13 = icmp ne i64 %12, 0
%14 = load i64, i64* %1
%15 = icmp ne i64 %14, 0
%16 = select i1 %13, i1 %15, i1 false
br i1 %16, label %8, label %17
17: ; preds = %8, %0
ret i32 0
}