#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 main() {
  int input, sum;
  printf("Enter a natural number:\n");
  scanf("%d", &input);
  sum = (input * (input + 1) * (2 * input + 1)) / 6;
  printf("Sum of squares of %d numbers is %d\n", input, sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed5(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    -0x8(%rbp),%ecx
add    $0x1,%ecx
imul   %ecx,%eax
mov    -0x8(%rbp),%ecx
shl    $0x1,%ecx
add    $0x1,%ecx
imul   %ecx,%eax
mov    $0x6,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xeef(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%esi
lea    0x1(%rsi),%eax
imul   %esi,%eax
lea    (%rsi,%rsi,1),%ecx
add    $0x1,%ecx
imul   %eax,%ecx
movslq %ecx,%rax
imul   $0x2aaaaaab,%rax,%rdx
mov    %rdx,%rax
shr    $0x3f,%rax
shr    $0x20,%rdx
add    %eax,%edx
lea    0xe84(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Enter a natural number:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [36 x i8] c"Sum of squares of %d numbers is %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = load i32, i32* %2
%8 = add nsw i32 %7, 1
%9 = mul nsw i32 %6, %8
%10 = load i32, i32* %2
%11 = mul nsw i32 2, %10
%12 = add nsw i32 %11, 1
%13 = mul nsw i32 %9, %12
%14 = sdiv i32 %13, 6
store i32 %14, i32* %3
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0), i32 %15, i32 %16)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [36 x i8] c"Sum of squares of %d numbers is %d\0A\00"
@str = [24 x i8] c"Enter a natural number:\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = add nsw i32 %5, 1
%7 = mul nsw i32 %6, %5
%8 = shl nsw i32 %5, 1
%9 = or i32 %8, 1
%10 = mul nsw i32 %7, %9
%11 = sdiv i32 %10, 6
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0), i32 %5, i32 %11)
ret i32 0
}