Back in the day I solved the first ~100 problems in order. It was a great practice to sharpen your programming logic and I learned a ton of math. The problems b

Back in the day I solved the first ~100 problems in order. It was a great practice to sharpen your programming logic and I learned a ton of math. The problems became harder. But I haven't done any in many years. Do you think the newer problems are very very hard ? I have to admire the dedication of those who have kept on it.