In this video, we solve the “Obtain the Sum” coding problem in a very beginner-friendly way using the C programming language.
You will learn:
How to understand the problem statement
Logic behind the formula
Why we use long long
Step-by-step dry run with examples
Complete C program explanation
Problem Concept:
Given an array:
A=[1,2,3,...,N]
Find position x such that after removing x, the remaining sum becomes S.
Formula Used:
x=
2
N(N+1)
−S
This tutorial is perfect for:
Beginners in C programming
Competitive programming students
CodeChef practice
Interview preparation
📌 Topics Covered:
Arrays
Mathematics
Competitive Programming
C Language
Time Complexity
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