#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() {
  int i, j, n;
  int a[n];
  scanf("%d", &n);
  for (i = 0; i < n; i++) {
    scanf("%d ", &a[i]);
  }
  for (i = 0; i < n; i++) {
    for (j = 0; j < i + 1; j++) {
      printf("%d ", a[n - 1 - j]);
    }
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    -0x10(%rbp),%eax
mov    %rsp,%rcx
mov    %rcx,-0x18(%rbp)
lea    0xf(,%rax,4),%rdx
and    $0xfffffffffffffff0,%rdx
mov    %rsp,%rcx
sub    %rdx,%rcx
mov    %rcx,-0x28(%rbp)
mov    %rcx,%rsp
mov    %rax,-0x20(%rbp)
lea    0xea3(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    11a2 <main+0x82>
mov    -0x28(%rbp),%rsi
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe74(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    116d <main+0x4d>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    1218 <main+0xf8>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    -0x8(%rbp),%ecx
add    $0x1,%ecx
cmp    %ecx,%eax
jge    11fc <main+0xdc>
mov    -0x28(%rbp),%rax
mov    -0x10(%rbp),%ecx
sub    $0x1,%ecx
sub    -0xc(%rbp),%ecx
movslq %ecx,%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe1c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    11bc <main+0x9c>
lea    0xe04(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    11a9 <main+0x89>
movl   $0x0,-0x4(%rbp)
mov    -0x18(%rbp),%rax
mov    %rax,%rsp
mov    -0x4(%rbp),%eax
mov    %rbp,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
mov    %rsp,%r15
lea    0xeba(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,0xc(%rsp)
jle    11eb <main+0xbb>
mov    %rsp,%rbx
xor    %ebp,%ebp
lea    0xe9c(%rip),%r14
nopw   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
add    $0x1,%rbp
movslq 0xc(%rsp),%rax
add    $0x4,%rbx
cmp    %rax,%rbp
jl     1170 <main+0x40>
test   %eax,%eax
jle    11eb <main+0xbb>
mov    $0x1,%r14d
lea    0xe65(%rip),%rbx
xor    %r12d,%r12d
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %r14d,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
mov    (%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0xffffffff,%ebp
jne    11c0 <main+0x90>
add    $0x1,%r12d
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x1,%r14d
cmp    0xc(%rsp),%r12d
jl     11b0 <main+0x80>
mov    %r15,%rsp
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [4 x i8] c"%d \00"
@.str.2 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i64
store i32 0, i32* %1
%7 = load i32, i32* %4
%8 = zext i32 %7 to i64
%9 = call i8* @llvm.stacksave()
store i8* %9, i8** %5
%10 = alloca i32, i64 %8
store i64 %8, i64* %6
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %4)
store i32 0, i32* %2
br label %12
12: ; preds = %21, %0
%13 = load i32, i32* %2
%14 = load i32, i32* %4
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %24
16: ; preds = %12
%17 = load i32, i32* %2
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds i32, i32* %10, i64 %18
%20 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %19)
br label %21
21: ; preds = %16
%22 = load i32, i32* %2
%23 = add nsw i32 %22, 1
store i32 %23, i32* %2
br label %12
24: ; preds = %12
store i32 0, i32* %2
br label %25
25: ; preds = %49, %24
%26 = load i32, i32* %2
%27 = load i32, i32* %4
%28 = icmp slt i32 %26, %27
br i1 %28, label %29, label %52
29: ; preds = %25
store i32 0, i32* %3
br label %30
30: ; preds = %44, %29
%31 = load i32, i32* %3
%32 = load i32, i32* %2
%33 = add nsw i32 %32, 1
%34 = icmp slt i32 %31, %33
br i1 %34, label %35, label %47
35: ; preds = %30
%36 = load i32, i32* %4
%37 = sub nsw i32 %36, 1
%38 = load i32, i32* %3
%39 = sub nsw i32 %37, %38
%40 = sext i32 %39 to i64
%41 = getelementptr inbounds i32, i32* %10, i64 %40
%42 = load i32, i32* %41
%43 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %42)
br label %44
44: ; preds = %35
%45 = load i32, i32* %3
%46 = add nsw i32 %45, 1
store i32 %46, i32* %3
br label %30
47: ; preds = %30
%48 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %49
49: ; preds = %47
%50 = load i32, i32* %2
%51 = add nsw i32 %50, 1
store i32 %51, i32* %2
br label %25
52: ; preds = %25
store i32 0, i32* %1
%53 = load i8*, i8** %5
%54 = load i32, i32* %1
ret i32 %54
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [4 x i8] c"%d \00"
define i32 @main() {
%1 = alloca [0 x i32]
%2 = alloca i32
%3 = bitcast i32* %2 to i8*
%4 = tail call i8* @llvm.stacksave()
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = icmp sgt i32 %6, 0
br i1 %7, label %12, label %35
8: ; preds = %12
%9 = icmp sgt i32 %17, 0
br i1 %9, label %10, label %35
10: ; preds = %8
%11 = getelementptr inbounds [0 x i32], [0 x i32]* %1, i64 0, i64 0
br label %20
12: ; preds = %0, %12
%13 = phi i64 [ %16, %12 ], [ 0, %0 ]
%14 = getelementptr inbounds [0 x i32], [0 x i32]* %1, i64 0, i64 %13
%15 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %14)
%16 = add nuw nsw i64 %13, 1
%17 = load i32, i32* %2
%18 = sext i32 %17 to i64
%19 = icmp slt i64 %16, %18
br i1 %19, label %12, label %8
20: ; preds = %10, %29
%21 = phi i32 [ 1, %10 ], [ %34, %29 ]
%22 = phi i32 [ 0, %10 ], [ %30, %29 ]
br label %23
23: ; preds = %23, %20
%24 = phi i32 [ 0, %20 ], [ %27, %23 ]
%25 = load i32, i32* %11
%26 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %25)
%27 = add nuw nsw i32 %24, 1
%28 = icmp eq i32 %27, %21
br i1 %28, label %29, label %23
29: ; preds = %23
%30 = add nuw nsw i32 %22, 1
%31 = call i32 @putchar(i32 10)
%32 = load i32, i32* %2
%33 = icmp slt i32 %30, %32
%34 = add nuw i32 %21, 1
br i1 %33, label %20, label %35
35: ; preds = %29, %0, %8
ret i32 0
}