#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 *, int *);
int /*<<< orphan*/ sum_search(int);
int main() {
  int times, number;
  scanf("%d", &times);
  while (times--) {
    scanf("%d", &number);
    if (number & (number - 1))
      sum_search(number);
    else
      printf("IMPOSSIBLE\n");
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x8(%rbp)
cmp    $0x0,%eax
je     11a5 <main+0x75>
lea    0xe96(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0xc(%rbp),%eax
mov    -0xc(%rbp),%ecx
sub    $0x1,%ecx
and    %ecx,%eax
cmp    $0x0,%eax
je     1194 <main+0x64>
mov    -0xc(%rbp),%edi
call   1040 <sum_search@plt>
jmp    11a0 <main+0x70>
lea    0xe68(%rip),%rdi
call   1030 <printf@plt>
jmp    114f <main+0x1f>
mov    -0x4(%rbp),%eax
add    $0x10,%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>
subl   $0x1,0x8(%rsp)
jb     11a1 <main+0x71>
lea    0xea8(%rip),%r14
lea    0xc(%rsp),%rbx
lea    0xe9f(%rip),%r15
jmp    117f <main+0x4f>
cs nopw 0x0(%rax,%rax,1)
mov    %r15,%rdi
call   1030 <puts@plt>
subl   $0x1,0x8(%rsp)
jb     11a1 <main+0x71>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%edi
lea    -0x1(%rdi),%eax
test   %eax,%edi
je     1170 <main+0x40>
call   1040 <sum_search@plt>
subl   $0x1,0x8(%rsp)
jae    117f <main+0x4f>
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 = [12 x i8] c"IMPOSSIBLE\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %5
5: ; preds = %21, %0
%6 = load i32, i32* %2
%7 = add nsw i32 %6, -1
store i32 %7, i32* %2
%8 = icmp ne i32 %6, 0
br i1 %8, label %9, label %22
9: ; preds = %5
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %3)
%11 = load i32, i32* %3
%12 = load i32, i32* %3
%13 = sub nsw i32 %12, 1
%14 = and i32 %11, %13
%15 = icmp ne i32 %14, 0
br i1 %15, label %16, label %19
16: ; preds = %9
%17 = load i32, i32* %3
%18 = call i32 @sum_search(i32 %17)
br label %21
19: ; preds = %9
%20 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
br label %21
21: ; preds = %19, %16
br label %5
22: ; preds = %5
%23 = load i32, i32* %1
ret i32 %23
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@str = [11 x i8] c"IMPOSSIBLE\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 ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = add nsw i32 %6, -1
store i32 %7, i32* %1
%8 = icmp eq i32 %6, 0
br i1 %8, label %22, label %9
9: ; preds = %0, %18
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%11 = load i32, i32* %2
%12 = call i32 @llvm.ctpop.i32(i32 %11)
%13 = icmp ult i32 %12, 2
br i1 %13, label %16, label %14
14: ; preds = %9
%15 = call i32 @sum_search(i32 %11)
br label %18
16: ; preds = %9
%17 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
br label %18
18: ; preds = %16, %14
%19 = load i32, i32* %1
%20 = add nsw i32 %19, -1
store i32 %20, i32* %1
%21 = icmp eq i32 %19, 0
br i1 %21, label %22, label %9
22: ; preds = %18, %0
ret i32 0
}