#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*/ computeCombination(int, int);
int /*<<< orphan*/ printf(char *, int, int, int /*<<< orphan*/);
int /*<<< orphan*/ scanf(char *, int *, int *);
int main() {
  int n, k;
  while (1) {
    scanf("%d %d", &n, &k);
    if (n == 0 && k == 0)
      break;
    printf("%d things taken %d at a time is %lld exactly.\n", n, k,
           computeCombination(n, k));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1050 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jne    116c <main+0x3c>
cmpl   $0x0,-0xc(%rbp)
jne    116c <main+0x3c>
jmp    119c <main+0x6c>
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1040 <computeCombination@plt>
mov    -0x14(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    %eax,%ecx
lea    0xe74(%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   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
lea    0xebe(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1050 <scanf@plt>
mov    0x4(%rsp),%ebp
mov    (%rsp),%ebx
mov    %ebp,%eax
or     %ebx,%eax
je     11b2 <main+0x82>
lea    0xea3(%rip),%r14
lea    0xe96(%rip),%r15
lea    0x4(%rsp),%r12
mov    %rsp,%r13
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %ebp,%edi
mov    %ebx,%esi
call   1040 <computeCombination@plt>
mov    %r14,%rdi
mov    %ebp,%esi
mov    %ebx,%edx
mov    %eax,%ecx
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %r12,%rsi
mov    %r13,%rdx
call   1050 <scanf@plt>
mov    0x4(%rsp),%ebp
mov    (%rsp),%ebx
mov    %ebp,%eax
or     %ebx,%eax
jne    1180 <main+0x50>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [6 x i8] c"%d %d\00"
@.str.1 = [47 x i8] c"%d things taken %d at a time is %lld exactly.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
br label %4
4: ; preds = %0, %12
%5 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %2, i32* %3)
%6 = load i32, i32* %2
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %12
8: ; preds = %4
%9 = load i32, i32* %3
%10 = icmp eq i32 %9, 0
br i1 %10, label %11, label %12
11: ; preds = %8
br label %19
12: ; preds = %8, %4
%13 = load i32, i32* %2
%14 = load i32, i32* %3
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = call i32 @computeCombination(i32 %15, i32 %16)
%18 = call i32 @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.1, i64 0, i64 0), i32 %13, i32 %14, i32 %17)
br label %4
19: ; preds = %11
ret i32 0
}

LLVM IR (-O2):
@.str = [6 x i8] c"%d %d\00"
@.str.1 = [47 x i8] c"%d things taken %d at a time is %lld exactly.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %1, i32* %2)
%6 = load i32, i32* %1
%7 = icmp eq i32 %6, 0
%8 = load i32, i32* %2
%9 = icmp eq i32 %8, 0
%10 = select i1 %7, i1 %9, i1 false
br i1 %10, label %22, label %11
11: ; preds = %0, %11
%12 = phi i32 [ %19, %11 ], [ %8, %0 ]
%13 = phi i32 [ %17, %11 ], [ %6, %0 ]
%14 = call i32 @computeCombination(i32 %13, i32 %12)
%15 = call i32 @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.1, i64 0, i64 0), i32 %13, i32 %12, i32 %14)
%16 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %1, i32* %2)
%17 = load i32, i32* %1
%18 = icmp eq i32 %17, 0
%19 = load i32, i32* %2
%20 = icmp eq i32 %19, 0
%21 = select i1 %18, i1 %20, i1 false
br i1 %21, label %22, label %11
22: ; preds = %11, %0
ret i32 0
}