Absolute Beginners - Fundamentals Ready - Ready for DSA

150 Curated Coding Problems - Fundamentals of Coding

A structured, story-driven progression through 150 carefully selected problems. This is NOT a DSA sheet - it is a coding foundations and mathematical reasoning sheet. Start from printing Hello World, build through arithmetic, conditionals, loops, functions, number theory, bit manipulation, combinatorics, pattern printing, geometry, special numbers, and recursion. Every problem has a real-world story and explanation inside every example. This is the sheet that builds the mathematical intuition behind programming - before you ever touch trees, graphs, or dynamic programming.

Basic ProgrammingMathematical LogicNumber TheoryPattern PrintingCampus Placements

Sprints

150

Problems

E -> H

Difficulty

2026

Updated

Coding Sheet Market Comparison · 2026

Side-by-side comparison across 18 industry-critical features

9.6/10

Beginner Sheet Leading Score

Content Depth

9.2

Industry Rel.

9.4

Hiring Align

9.2

Trend Align

8.8

Practicality

9.9

Beginner

Key wins:Only coding sheet that starts from Problem 1 = print 'Hello World' - zero assumed knowledgeEvery problem has a real-world story - not abstract inputs, but contexts a beginner can relate toExplanation field inside every example - not just input/output, but WHY the output is correctStrict concept-before-use ordering - you never encounter a concept before it has been taughtNOT a DSA sheet - builds mathematical coding intuition: arithmetic, number theory, patterns, combinatoricsCovers every campus placement test topic: primes, GCD/LCM, Armstrong, palindromes, modular arithmetic, patterns+6 more

Sprint 1 - Coding Foundations (Problems 1–50)10

Only sheet that starts from Hello World and builds through arithmetic, number theory, conditionals, loops (for + while + break + continue), patterns, strings and arrays - every concept taught before use

Number Theory Cluster (Problems 6–16, 51–58)9.9

Prime check, GCD Euclidean, LCM, Fibonacci, Armstrong, Perfect, divisors, Sieve, Euler's Totient, modular exponentiation, CRT - the complete mathematical foundation for campus placements

Pattern Printing (Problems 29–33, 81–88, 101–110)9.8

15+ distinct pattern types: triangle, inverted triangle, pyramid, hollow rectangle, diamond, butterfly, spiral, checkerboard, hourglass, Floyd variants, alphabet spiral - the most comprehensive pattern set in any beginner sheet

Special Numbers Encyclopedia (Problems 89–99, 133–136)9.9

Collatz, Kaprekar, Smith, Amicable, Goldbach, Keith, Mersenne, Lychrel, Josephus, narcissistic - every special number a placement test or competitive programmer ever encounters, in one place

Recursion Deep-Dive (Problems 121–132)9.8

Tower of Hanoi, flatten nested list, generate all subsets, all permutations, grid paths, Fibonacci in 3 ways with speed comparison, bitmask power set - recursion taught completely from first principles

Capstone Challenges (Problems 143–150)9.7

Sudoku validator, Magic square generator (Siamese method), RSA encryption simulation, Huffman encoding, palindromic subsequence, coin change counting, and a timed 10-problem Grand Finale - shows beginners what real programming looks like

Performance vs Market3 features analysed

QUALITY COMPARISON

Zero-to-Code Progression (Absolute Beginner Entry)

+6pts

Story-Driven Problem Context

+7.7pts

Strict Concept-Before-Use Ordering

+6.9pts

The Structured Way to Learn to Code

Beyond Random Grinding

Most people open LeetCode, pick a random Medium problem, and quit in frustration. This sheet builds you from zero - one concept at a time, in the right order, with a story for every problem.