#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, int);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int numv, caseid;
  caseid = 1;
  while (1) {
    scanf("%d", &numv);
    if (!numv)
      break;
    printf("Case %d: %d\n", caseid, numv >> 1);
    caseid++;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0xc(%rbp)
lea    0xec3(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jne    1155 <main+0x35>
jmp    1178 <main+0x58>
mov    -0xc(%rbp),%esi
mov    -0x8(%rbp),%edx
sar    $0x1,%edx
lea    0xe9e(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1136 <main+0x16>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xed1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%edx
test   %edx,%edx
je     1182 <main+0x62>
mov    $0x1,%ebx
lea    0xeb6(%rip),%r14
lea    0xeac(%rip),%r15
lea    0x4(%rsp),%r12
nopl   0x0(%rax)
sar    %edx
mov    %r14,%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
add    $0x1,%ebx
mov    %r15,%rdi
mov    %r12,%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%edx
test   %edx,%edx
jne    1160 <main+0x40>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [13 x i8] c"Case %d: %d\0A\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 %15, label %6
6: ; preds = %0, %6
%7 = phi i32 [ %13, %6 ], [ %4, %0 ]
%8 = phi i32 [ %11, %6 ], [ 1, %0 ]
%9 = ashr i32 %7, 1
%10 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 %8, i32 %9)
%11 = add nuw nsw i32 %8, 1
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%13 = load i32, i32* %1
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %6
15: ; preds = %6, %0
ret i32 0
}