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Problem Statement : Given an array and multiple queries [L, R], find the sum of elements in that range. Naive Approach For every query, traverse the range and calculate the sum. ⏱️ Time Complexity: ...

This protocol is an object that contains a next () method and next () returns another object that has two properties: value and done. 🔺 𝐁𝐮𝐢𝐥𝐭-𝐢𝐧 𝐢𝐭𝐞𝐫𝐚𝐛𝐥𝐞𝐬 𝐨𝐛𝐣𝐞𝐜𝐭𝐬: Array, ...