Permutation problems

5 Permutation DSA practice problems on CampusCode, each with statement, examples and constraints.

• 1330. Beautiful Arrangement — Bitmask Backtracking Medium Bit Manipulation
• 1348. Number of Squareful Arrays (Bitmask) Medium Bit Manipulation
• 1360. Circular Permutation in Binary Representation Medium Bit Manipulation
• 1370. Decode XOR Encoded Permutation Medium Bit Manipulation
• 1406. Fast Fourier Transform Butterfly — Bit Reversal Hard Bit Manipulation