#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 *, float);
int /*<<< orphan*/ scanf(char *, float *, float *, float *);
int main() {
  float num1;
  float num2;
  float num3;
  float result;
  scanf("%f %f %f", &num1, &num2, &num3);
  result = (num2 * num2 - 4 * num1 * num3) / 2 * num1;
  printf("%.2f", result);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xed2(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
call   1040 <scanf@plt>
movss  -0xc(%rbp),%xmm0
movss  -0xc(%rbp),%xmm2
movss  0xeab(%rip),%xmm1
mulss  -0x8(%rbp),%xmm1
mulss  -0x10(%rbp),%xmm1
movd   %xmm1,%eax
xor    $0x80000000,%eax
movd   %eax,%xmm1
mulss  %xmm2,%xmm0
addss  %xmm1,%xmm0
movss  0xe80(%rip),%xmm1
divss  %xmm1,%xmm0
mulss  -0x8(%rbp),%xmm0
movss  %xmm0,-0x14(%rbp)
movss  -0x14(%rbp),%xmm0
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xedd(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
call   1040 <scanf@plt>
movss  0x10(%rsp),%xmm0
movss  0x14(%rsp),%xmm1
movss  0xead(%rip),%xmm2
mulss  %xmm1,%xmm2
mulss  0xc(%rsp),%xmm2
mulss  %xmm0,%xmm0
addss  %xmm2,%xmm0
mulss  0xe97(%rip),%xmm0
mulss  %xmm1,%xmm0
lea    0xe99(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [9 x i8] c"%f %f %f\00"
@.str.1 = [5 x i8] c"%.2f\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
%5 = alloca float
store i32 0, i32* %1
%6 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), float* %2, float* %3, float* %4)
%7 = load float, float* %3
%8 = load float, float* %3
%9 = load float, float* %2
%10 = fmul float 4.000000e+00, %9
%11 = load float, float* %4
%12 = fmul float %10, %11
%13 = fneg float %12
%14 = call float @llvm.fmuladd.f32(float %7, float %8, float %13)
%15 = fdiv float %14, 2.000000e+00
%16 = load float, float* %2
%17 = fmul float %15, %16
store float %17, float* %5
%18 = load float, float* %5
%19 = call i32 @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), float %18)
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"%f %f %f\00"
@.str.1 = [5 x i8] c"%.2f\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = alloca float
%4 = bitcast float* %1 to i8*
%5 = bitcast float* %2 to i8*
%6 = bitcast float* %3 to i8*
%7 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), float* %1, float* %2, float* %3)
%8 = load float, float* %2
%9 = load float, float* %1
%10 = load float, float* %3
%11 = fmul float %9, -4.000000e+00
%12 = fmul float %11, %10
%13 = call float @llvm.fmuladd.f32(float %8, float %8, float %12)
%14 = fmul float %13, 5.000000e-01
%15 = fmul float %9, %14
%16 = call i32 @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), float %15)
ret i32 0
}