📢 Discussion: Subarray Sums - Efficient Algorithm Challenge 🚀

[IamShiwangi]

📢 Discussion: Subarray Sums - Efficient Algorithm Challenge 🚀

Problem Statement

You are given a 1-indexed array of length n. The number of queries is given as q. Each query consists of three integers:

• l → Start Index
• r → End Index
• x → Value to Add for Each Zero

For each query, compute the sum of elements in the range [l, r], and for every occurrence of zero in that range, add x to the final sum.

---

💡 Example

Input

n = 4  
numbers = [20, 30, 0, 40]  
q = 1  
queries = [(1, 3, 10)]

Calculation

1️⃣ Sum from index 1 to 3 → 20 + 30 + 0 = 50
2️⃣ Count Zeros → 1 zero found
3️⃣ Modify the sum → 50 + (1 * 10) = 60

Output

60

---

💬 Discussion Topics

1️⃣ How would you optimize this problem for large inputs?
2️⃣ Would a prefix sum approach be the best choice? Why?
3️⃣ Are there any real-world use cases where such calculations would be helpful?

---

💡 🔗 Share your solutions & thoughts below! Let's collaborate to find the most efficient approach. 🚀