#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);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n;
  scanf("%d", &n);
  int sum = 0;
  while (n--) {
    int x;
    scanf("%d", &x);
    if (x < 0)
      sum -= x;
  }
  printf("%d\n", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x8(%rbp)
cmp    $0x0,%eax
je     1184 <main+0x64>
lea    0xe9f(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x10(%rbp)
jge    117f <main+0x5f>
mov    -0x10(%rbp),%ecx
mov    -0xc(%rbp),%eax
sub    %ecx,%eax
mov    %eax,-0xc(%rbp)
jmp    1146 <main+0x26>
mov    -0xc(%rbp),%esi
lea    0xe75(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%rdi
lea    0x8(%rsp),%rsi
call   1040 <scanf@plt>
xor    %ebx,%ebx
subl   $0x1,0x8(%rsp)
jb     117f <main+0x5f>
xor    %ebx,%ebx
lea    0xeb4(%rip),%r14
lea    0xc(%rsp),%r15
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%eax
mov    %eax,%ecx
sar    $0x1f,%ecx
and    %eax,%ecx
sub    %ecx,%ebx
subl   $0x1,0x8(%rsp)
jae    1160 <main+0x40>
lea    0xe7d(%rip),%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
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 = [4 x i8] c"%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
store i32 0, i32* %3
br label %6
6: ; preds = %18, %0
%7 = load i32, i32* %2
%8 = add nsw i32 %7, -1
store i32 %8, i32* %2
%9 = icmp ne i32 %7, 0
br i1 %9, label %10, label %19
10: ; preds = %6
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %4)
%12 = load i32, i32* %4
%13 = icmp slt i32 %12, 0
br i1 %13, label %14, label %18
14: ; preds = %10
%15 = load i32, i32* %4
%16 = load i32, i32* %3
%17 = sub nsw i32 %16, %15
store i32 %17, i32* %3
br label %18
18: ; preds = %14, %10
br label %6
19: ; preds = %6
%20 = load i32, i32* %3
%21 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %20)
ret i32 0
}

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