I've solved a lot of problems on codeforces, codechef and atcoder. Sorry, not solved, wasted a lot of time. I tried a lot to think logic on problem B of todays contest, but still didn't come up with the solution. I don't know, whether it's a good decision or not, but I'm giving up. Honestly, need some strong intuition to carry one. Please if you have, suggest me.
Some people solve 2000 problems just to achieve specialist