DP 56. Count Square Submatrices with All Ones | DP on Rectangles 🔥

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🔥 Hey everyone, I’m Raj (Striver), a Software Engineer and an educator. In the last 5 years, I have had the privilege of working at Google, Amazon, and Media.net, and today I am building takeUforward, the world’s first ONE STOP preparation platform. Our dream is simple: to create a world-class product from India at an affordable cost, while also ensuring that free learning at TUF is among the best out there. Back in college, I was a CM on Codeforces and a 6★ on CodeChef. But honestly, more than ratings, what excites me is teaching the way I wish I had been taught. I may not be the best coder in the country, but when it comes to explaining concepts deeply, clearly, and at scale, I would like to believe this channel speaks for itself. Here, you will not just find algorithms, you will find the entire thought process behind problem solving, taught in structured, in-depth, English lectures with enough practice and volume to prepare you for real interviews. 📩 [email protected]