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DSA Brain Training Series By Shivam Shakya. ✓ Brute O(n²) ✓ Prefix Sum + HashMap → O(n) time ✓ Step by step intuition ...

In this video, we learn how to find the Sum of Subarray Minimums, a very important and slightly tricky problem frequently asked in ...

In this video, we solve GeeksforGeeks Problem of the Day – *Count X in Range of a Sorted Array* using *Binary Search* (Lower ...

The Two Pointers technique is one of the most powerful tools in your coding interview arsenal! In this comprehensive tutorial, I'll ...

The Two Pointers technique is one of the most powerful tools in your coding interview arsenal! In this comprehensive tutorial, I'll ...

Hashing is arguably the MOST IMPORTANT technique in coding interviews. It turns O(n²) solutions into O(n) and solves problems ...

DSA Brain Training Series by Shivam Shakya. → PREFIX SUM TECHNIQUE Full package hai: ✓ Prefix Sum kya hota hai?