Скачать или смотреть Alphabet Staircase Pattern | Strivers TUF+ Pinnacle Course | Logic + Dry Run + Complexity Analysis

In this video, we print an alphabet staircase pattern for a given integer N.
For N = 5, the output is:

E
D E
C D E
B C D E
A B C D E

We’ll learn:

How to map indices to characters ('A' + offset)

How to control rows & columns with nested loops

How to start each row from the correct letter (from A+N-i-1 to A+N-1)

🧩 Problem Statement

Given an integer N, print N rows.

Row i (1-indexed) starts from the character chr('A' + (N - i)) and goes up to chr('A' + N - 1).

Characters are space-separated.

Example (N=5):

E
D E
C D E
B C D E
A B C D E


Constraints (typical): 1 ≤ N ≤ 26

🧠 Approach (High-Level)

Outer loop: i from 0 to N-1 (each row)

Compute start = 'A' + (N - 1 - i) and end = 'A' + (N - 1)

Inner loop: ch from start to end, print with spaces

✅ What You’ll Practice

ASCII/Unicode char arithmetic

Nested loops

Clean formatting with spaces

✍️ Try It Yourself

Change N to test different sizes (e.g., 3, 7)

Left/right-align variants

Invert the pattern (top starts with A)