Dsa Recursion Tower Of Hanoi

In this tutorial, you'll learn about How to Fix Tower of Hanoi Errors. We cover key concepts, practical examples, and best practices.

Fix tower of hanoi errors when disk movement order reversed or peg labeling wrong.

Quick Fix

Wrong

def hanoi(n,frm,to,aux):
    if n==1: print(f'Move {frm} to {to}'); return
    hanoi(n-1,frm,aux,to)
    print(f'Move {frm} to {to}')
    hanoi(n-1,aux,to,frm)

Common mistake: swapping aux and to in the second recursive call.

Right

def hanoi(n,frm,to,aux):
    if n==0: return
    hanoi(n-1,frm,aux,to)
    print(f'Disk {n}: {frm} -> {to}')
    hanoi(n-1,aux,to,frm)

n=3 A->C -> moves: A->C, A->B, C->B, A->C, B->A, B->C, A->C. O(2^n).

Prevention

Move n-1 disks from source to auxiliary. Move nth disk from source to target. Move n-1 from aux to target.

DodaTech Tools

Doda Browser's algorithm visualizer steps through DSA operations line by line. DodaZIP archives implementation patterns for team sharing. Durga Antivirus Pro detects memory corruption patterns in algorithm implementations.

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