#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 obterValor(int);
int /*<<< orphan*/ printf(char *, double);
int /*<<< orphan*/ scanf(char *, int *, ...);
int main(void) {
  int totalDeItensComprados, codigoDoProduto, quantidadeDeItensDoProduto;
  double valorTotal = 0.0;
  scanf("%d", &totalDeItensComprados);
  while (totalDeItensComprados-- > 0) {
    scanf("%d %d", &codigoDoProduto, &quantidadeDeItensDoProduto);
    valorTotal += obterValor(codigoDoProduto) * quantidadeDeItensDoProduto;
  }
  printf("%.2f\n", valorTotal);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movsd  %xmm0,-0x18(%rbp)
lea    0xeb5(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x8(%rbp)
cmp    $0x0,%eax
jle    11a2 <main+0x72>
lea    0xe8c(%rip),%rdi
lea    -0xc(%rbp),%rsi
lea    -0x10(%rbp),%rdx
mov    $0x0,%al
call   1050 <scanf@plt>
mov    -0xc(%rbp),%edi
call   1030 <obterValor@plt>
imul   -0x10(%rbp),%eax
cvtsi2sd %eax,%xmm0
addsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x18(%rbp)
jmp    1159 <main+0x29>
movsd  -0x18(%rbp),%xmm0
lea    0xe58(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x20,%rsp
lea    0xec3(%rip),%rdi
lea    0xc(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
mov    0xc(%rsp),%eax
lea    -0x1(%rax),%ecx
mov    %ecx,0xc(%rsp)
xorps  %xmm0,%xmm0
test   %eax,%eax
jle    11c0 <main+0x90>
lea    0xe9b(%rip),%r14
lea    0x1c(%rsp),%r15
lea    0x18(%rsp),%rbx
nop
movsd  %xmm0,0x10(%rsp)
mov    %r14,%rdi
mov    %r15,%rsi
mov    %rbx,%rdx
xor    %eax,%eax
call   1050 <scanf@plt>
mov    0x1c(%rsp),%edi
call   1030 <obterValor@plt>
imul   0x18(%rsp),%eax
xorps  %xmm0,%xmm0
cvtsi2sd %eax,%xmm0
movsd  0x10(%rsp),%xmm1
addsd  %xmm0,%xmm1
movsd  %xmm1,0x10(%rsp)
movsd  0x10(%rsp),%xmm0
mov    0xc(%rsp),%eax
lea    -0x1(%rax),%ecx
mov    %ecx,0xc(%rsp)
test   %eax,%eax
jg     1170 <main+0x40>
lea    0xe3f(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [6 x i8] c"%.2f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca double
store i32 0, i32* %1
store double 0.000000e+00, double* %5
%6 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %7
7: ; preds = %11, %0
%8 = load i32, i32* %2
%9 = add nsw i32 %8, -1
store i32 %9, i32* %2
%10 = icmp sgt i32 %8, 0
br i1 %10, label %11, label %20
11: ; preds = %7
%12 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %3, i32* %4)
%13 = load i32, i32* %3
%14 = call i32 @obterValor(i32 %13)
%15 = load i32, i32* %4
%16 = mul nsw i32 %14, %15
%17 = sitofp i32 %16 to double
%18 = load double, double* %5
%19 = fadd double %18, %17
store double %19, double* %5
br label %7
20: ; preds = %7
%21 = load double, double* %5
%22 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), double %21)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [6 x i8] c"%.2f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = bitcast i32* %1 to i8*
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%8 = load i32, i32* %1
%9 = add nsw i32 %8, -1
store i32 %9, i32* %1
%10 = icmp sgt i32 %8, 0
br i1 %10, label %11, label %23
11: ; preds = %0, %11
%12 = phi double [ %19, %11 ], [ 0.000000e+00, %0 ]
%13 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%14 = load i32, i32* %2
%15 = call i32 @obterValor(i32 %14)
%16 = load i32, i32* %3
%17 = mul nsw i32 %16, %15
%18 = sitofp i32 %17 to double
%19 = fadd double %12, %18
%20 = load i32, i32* %1
%21 = add nsw i32 %20, -1
store i32 %21, i32* %1
%22 = icmp sgt i32 %20, 0
br i1 %22, label %11, label %23
23: ; preds = %11, %0
%24 = phi double [ 0.000000e+00, %0 ], [ %19, %11 ]
%25 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), double %24)
ret i32 0
}