#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*/ free(int *);
int *malloc(int);
int /*<<< orphan*/ printf(char *, int);
int /*<<< orphan*/ scanf(char *, int *);
int solveStaircase(int, int *);
int main() {
  int n;
  scanf("%d", &n);
  int *price = malloc(n * sizeof(int));
  int i;
  for (i = 0; i < n; i += 1) {
    scanf("%d", &price[i]);
  }
  int result = solveStaircase(n, price);
  free(price);
  printf("%d\n", result);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11be <main+0x6e>
mov    -0x10(%rbp),%rsi
movslq -0x14(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe55(%rip),%rdi
call   1060 <scanf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1189 <main+0x39>
mov    -0x8(%rbp),%edi
mov    -0x10(%rbp),%rsi
call   1070 <solveStaircase@plt>
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <free@plt>
mov    -0x18(%rbp),%esi
lea    0xe23(%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   %r13
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xe9c(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%r12d
lea    0x0(,%r12,4),%edi
call   1050 <malloc@plt>
mov    %rax,%r14
test   %r12d,%r12d
jle    11bd <main+0x6d>
xor    %r13d,%r13d
lea    0xe6e(%rip),%r15
mov    %r14,%rbx
cs nopw 0x0(%rax,%rax,1)
nop
mov    %r15,%rdi
mov    %rbx,%rsi
call   1060 <scanf@plt>
add    $0x1,%r13
movslq 0xc(%rsp),%r12
add    $0x4,%rbx
cmp    %r12,%r13
jl     11a0 <main+0x50>
mov    %r12d,%edi
mov    %r14,%rsi
call   1070 <solveStaircase@plt>
mov    %eax,%ebx
mov    %r14,%rdi
call   1030 <free@plt>
lea    0xe2a(%rip),%rdi
mov    %ebx,%esi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r13
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
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %2
%8 = sext i32 %7 to i64
%9 = mul i64 %8, 4
%10 = trunc i64 %9 to i32
%11 = call i32* @malloc(i32 %10)
store i32* %11, i32** %3
store i32 0, i32* %4
br label %12
12: ; preds = %22, %0
%13 = load i32, i32* %4
%14 = load i32, i32* %2
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %25
16: ; preds = %12
%17 = load i32*, i32** %3
%18 = load i32, i32* %4
%19 = sext i32 %18 to i64
%20 = getelementptr inbounds i32, i32* %17, i64 %19
%21 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %20)
br label %22
22: ; preds = %16
%23 = load i32, i32* %4
%24 = add nsw i32 %23, 1
store i32 %24, i32* %4
br label %12
25: ; preds = %12
%26 = load i32, i32* %2
%27 = load i32*, i32** %3
%28 = call i32 @solveStaircase(i32 %26, i32* %27)
store i32 %28, i32* %5
%29 = load i32*, i32** %3
%30 = call i32 @free(i32* %29)
%31 = load i32, i32* %5
%32 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %31)
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 = bitcast i32* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%4 = load i32, i32* %1
%5 = shl i32 %4, 2
%6 = call i32* @malloc(i32 %5)
%7 = icmp sgt i32 %4, 0
br i1 %7, label %8, label %16
8: ; preds = %0, %8
%9 = phi i64 [ %12, %8 ], [ 0, %0 ]
%10 = getelementptr inbounds i32, i32* %6, i64 %9
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %10)
%12 = add nuw nsw i64 %9, 1
%13 = load i32, i32* %1
%14 = sext i32 %13 to i64
%15 = icmp slt i64 %12, %14
br i1 %15, label %8, label %16
16: ; preds = %8, %0
%17 = phi i32 [ %4, %0 ], [ %13, %8 ]
%18 = call i32 @solveStaircase(i32 %17, i32* %6)
%19 = call i32 @free(i32* %6)
%20 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %18)
ret i32 0
}