#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 size;
  scanf("%d", &size);
  for (int row = size; row > 0; row--) {
    for (int column = 1; column < row; column++) {
      printf("%d ", column);
    }
    printf("%d\n", row);
  }
  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>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jle    119c <main+0x7c>
movl   $0x1,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    117f <main+0x5f>
mov    -0x10(%rbp),%esi
lea    0xe97(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1156 <main+0x36>
mov    -0xc(%rbp),%esi
lea    0xe7e(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    1145 <main+0x25>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
lea    0xed2(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%ebx
test   %ebx,%ebx
jle    1195 <main+0x75>
lea    0xebc(%rip),%r14
lea    0xeb9(%rip),%r15
xchg   %ax,%ax
cmp    $0x2,%ebx
jb     1187 <main+0x67>
mov    $0x1,%ebp
nopw   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %ebp,%esi
call   1030 <printf@plt>
add    $0x1,%ebp
cmp    %ebp,%ebx
jne    1160 <main+0x40>
mov    %r15,%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
lea    -0x1(%rbx),%eax
cmp    $0x1,%ebx
mov    %eax,%ebx
ja     1150 <main+0x30>
jmp    1195 <main+0x75>
lea    0xe79(%rip),%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
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 = [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)
%6 = load i32, i32* %2
store i32 %6, i32* %3
br label %7
7: ; preds = %24, %0
%8 = load i32, i32* %3
%9 = icmp sgt i32 %8, 0
br i1 %9, label %10, label %27
10: ; preds = %7
store i32 1, i32* %4
br label %11
11: ; preds = %18, %10
%12 = load i32, i32* %4
%13 = load i32, i32* %3
%14 = icmp slt i32 %12, %13
br i1 %14, label %15, label %21
15: ; preds = %11
%16 = load i32, i32* %4
%17 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %16)
br label %18
18: ; preds = %15
%19 = load i32, i32* %4
%20 = add nsw i32 %19, 1
store i32 %20, i32* %4
br label %11
21: ; preds = %11
%22 = load i32, i32* %3
%23 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %22)
br label %24
24: ; preds = %21
%25 = load i32, i32* %3
%26 = add nsw i32 %25, -1
store i32 %26, i32* %3
br label %7
27: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [4 x i8] c"%d \00"
@.str.2 = [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 = icmp sgt i32 %4, 0
br i1 %5, label %6, label %11
6: ; preds = %0, %12
%7 = phi i32 [ %14, %12 ], [ %4, %0 ]
%8 = icmp ugt i32 %7, 1
br i1 %8, label %15, label %9
9: ; preds = %6
%10 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %7)
br label %11
11: ; preds = %12, %9, %0
ret i32 0
12: ; preds = %15
%13 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %7)
%14 = add nsw i32 %7, -1
br i1 %8, label %6, label %11
15: ; preds = %6, %15
%16 = phi i32 [ %18, %15 ], [ 1, %6 ]
%17 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %16)
%18 = add nuw nsw i32 %16, 1
%19 = icmp eq i32 %18, %7
br i1 %19, label %12, label %15
}