#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(void) {
  int n, i;
  scanf("%d", &n);
  while (n >= 1) {
    for (i = 0; i < n; i++) {
      printf("*");
    }
    printf("\n");
    n -= 2;
  }
}


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>
cmpl   $0x1,-0x8(%rbp)
jl     1190 <main+0x70>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1176 <main+0x56>
lea    0xea0(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1150 <main+0x30>
lea    0xe88(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
sub    $0x2,%eax
mov    %eax,-0x8(%rbp)
jmp    113f <main+0x1f>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,0xc(%rsp)
jle    1172 <main+0x52>
xor    %ebx,%ebx
nop
mov    $0x2a,%edi
call   1030 <putchar@plt>
add    $0x1,%ebx
cmp    0xc(%rsp),%ebx
jl     1140 <main+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    0xc(%rsp),%eax
lea    -0x2(%rax),%ecx
mov    %ecx,0xc(%rsp)
mov    $0x0,%ebx
cmp    $0x2,%eax
jg     1140 <main+0x20>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [2 x i8] c"*\00"
@.str.2 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %5
5: ; preds = %18, %0
%6 = load i32, i32* %2
%7 = icmp sge i32 %6, 1
br i1 %7, label %8, label %22
8: ; preds = %5
store i32 0, i32* %3
br label %9
9: ; preds = %15, %8
%10 = load i32, i32* %3
%11 = load i32, i32* %2
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %18
13: ; preds = %9
%14 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %15
15: ; preds = %13
%16 = load i32, i32* %3
%17 = add nsw i32 %16, 1
store i32 %17, i32* %3
br label %9
18: ; preds = %9
%19 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%20 = load i32, i32* %2
%21 = sub nsw i32 %20, 2
store i32 %21, i32* %2
br label %5
22: ; preds = %5
%23 = load i32, i32* %1
ret i32 %23
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\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 = icmp sgt i32 %4, 0
br i1 %5, label %6, label %19
6: ; preds = %0, %12
%7 = phi i32 [ %13, %12 ], [ 0, %0 ]
%8 = call i32 @putchar(i32 42)
%9 = add nuw nsw i32 %7, 1
%10 = load i32, i32* %1
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %14
12: ; preds = %6, %14
%13 = phi i32 [ %9, %6 ], [ 0, %14 ]
br label %6
14: ; preds = %6
%15 = call i32 @putchar(i32 10)
%16 = load i32, i32* %1
%17 = add nsw i32 %16, -2
store i32 %17, i32* %1
%18 = icmp sgt i32 %16, 2
br i1 %18, label %12, label %19
19: ; preds = %14, %0
ret i32 0
}