#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);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int days;
  scanf("%d", &days);
  while (days > 0) {
    printf("%d days are %d weeks, %d days.\n", days, days / 7, days % 7);
    scanf("%d", &days);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jle    118b <main+0x6b>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%eax
mov    $0x7,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%eax
mov    $0x7,%ecx
cltd
idiv   %ecx
mov    %edx,%ecx
mov    -0xc(%rbp),%edx
lea    0xe92(%rip),%rdi
call   1030 <printf@plt>
lea    0xe83(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
jmp    113f <main+0x1f>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
test   %esi,%esi
jle    11a0 <main+0x80>
lea    0xeba(%rip),%r14
lea    0xeb0(%rip),%r15
lea    0xc(%rsp),%rbx
cs nopw 0x0(%rax,%rax,1)
nop
mov    %esi,%eax
imul   $0x24924925,%rax,%rax
shr    $0x20,%rax
mov    %esi,%edx
sub    %eax,%edx
shr    %edx
add    %eax,%edx
shr    $0x2,%edx
lea    0x0(,%rdx,8),%eax
mov    %edx,%ecx
sub    %eax,%ecx
add    %esi,%ecx
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
test   %esi,%esi
jg     1160 <main+0x40>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [32 x i8] c"%d days are %d weeks, %d days.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %4
4: ; preds = %7, %0
%5 = load i32, i32* %2
%6 = icmp sgt i32 %5, 0
br i1 %6, label %7, label %15
7: ; preds = %4
%8 = load i32, i32* %2
%9 = load i32, i32* %2
%10 = sdiv i32 %9, 7
%11 = load i32, i32* %2
%12 = srem i32 %11, 7
%13 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i32 %8, i32 %10, i32 %12)
%14 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %4
15: ; preds = %4
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [32 x i8] c"%d days are %d weeks, %d days.\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 sgt i32 %4, 0
br i1 %5, label %6, label %14
6: ; preds = %0, %6
%7 = phi i32 [ %12, %6 ], [ %4, %0 ]
%8 = udiv i32 %7, 7
%9 = urem i32 %7, 7
%10 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i32 %7, i32 %8, i32 %9)
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%12 = load i32, i32* %1
%13 = icmp sgt i32 %12, 0
br i1 %13, label %6, label %14
14: ; preds = %6, %0
ret i32 0
}