#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 x, y, n, m = 'A';
  scanf("%d", &n);
  for (y = n; y > 0; y--, printf("\n"))
    for (x = 0; x < y; x++, printf("%c", m++))
      ;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x41,-0x14(%rbp)
lea    0xec3(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jle    11b6 <main+0x96>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1195 <main+0x75>
jmp    116e <main+0x4e>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x14(%rbp),%esi
mov    %esi,%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    115d <main+0x3d>
jmp    119a <main+0x7a>
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
lea    0xe5c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    114c <main+0x2c>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%r14d
test   %r14d,%r14d
jle    118b <main+0x6b>
mov    $0x41,%r15d
nopw   0x0(%rax,%rax,1)
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
lea    (%r15,%rbx,1),%edi
call   1030 <putchar@plt>
add    $0x1,%ebx
cmp    %ebx,%r14d
jne    1160 <main+0x40>
lea    -0x1(%r14),%ebx
mov    $0xa,%edi
call   1030 <putchar@plt>
add    %r14d,%r15d
cmp    $0x1,%r14d
mov    %ebx,%r14d
jg     1150 <main+0x30>
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 = [3 x i8] c"%c\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 i32
store i32 0, i32* %1
store i32 65, i32* %5
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %4)
%7 = load i32, i32* %4
store i32 %7, i32* %3
br label %8
8: ; preds = %24, %0
%9 = load i32, i32* %3
%10 = icmp sgt i32 %9, 0
br i1 %10, label %11, label %28
11: ; preds = %8
store i32 0, i32* %2
br label %12
12: ; preds = %17, %11
%13 = load i32, i32* %2
%14 = load i32, i32* %3
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %23
16: ; preds = %12
br label %17
17: ; preds = %16
%18 = load i32, i32* %2
%19 = add nsw i32 %18, 1
store i32 %19, i32* %2
%20 = load i32, i32* %5
%21 = add nsw i32 %20, 1
store i32 %21, i32* %5
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32 %20)
br label %12
23: ; preds = %12
br label %24
24: ; preds = %23
%25 = load i32, i32* %3
%26 = add nsw i32 %25, -1
store i32 %26, i32* %3
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %8
28: ; preds = %8
%29 = load i32, i32* %1
ret i32 %29
}

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, %15
%7 = phi i32 [ %9, %15 ], [ 65, %0 ]
%8 = phi i32 [ %16, %15 ], [ %4, %0 ]
%9 = add i32 %7, %8
br label %10
10: ; preds = %6, %10
%11 = phi i32 [ %12, %10 ], [ %7, %6 ]
%12 = add i32 %11, 1
%13 = call i32 @putchar(i32 %11)
%14 = icmp eq i32 %12, %9
br i1 %14, label %15, label %10
15: ; preds = %10
%16 = add nsw i32 %8, -1
%17 = call i32 @putchar(i32 10)
%18 = icmp sgt i32 %8, 1
br i1 %18, label %6, label %19
19: ; preds = %15, %0
ret i32 0
}