PRANAY's 18th August 2025

Today after a hectic day at college I solved the TLE ELIMINATOR CP-31 sheet which is a great resource for any one who want to have a taste of CP with Leetcode

The fifth Question TLE CP-31 was Jagged Swaps
—>My take on this was that it might be a good question but it came out to be simple as in this question we were given with a permutation (A permutation is a array which has elements from 1 to array.length simply) and we have to tell if i can sort it or not given some condition . My brain quickly clicked that the only thing i had to check was if the first digit of permutation was 1 or not and the problem got solved in no time .

The sixth question of the TLE CP-31 sheet was Doremy's Paint 3
—>Earlier i thought to solve this question without hashmap but it was biut tricky and led to wrong submission as well so i switched to simplicity of HashMap but i will try to find why my variable solution didnt worked .Overall it was a easy problem where the simple relation that alternate values in the array must be same reduced the question to a easy level problem .

After solving few questions from the list i decided to do some leetcode and i started with the Question of the day which was 24Game .At first I was unsure if i could do it as i was a hard problem but it used onyl bactracking and no DP so i decided to give it a try .I felt parenthesis as a rpoblem but there werent ,they were just telling me the sequence in i have to to apply operation to elements which i am doing using backtracking so they were not the problem ,but the floating division was . I handled it by using Math.abs(val - 24.0) < EPS where eps was 1e-5 or 10^-5 which solved my problem of off by few decimal places of 24.

Also I solved Evaluate Boolean Binary Tree
In this question i initially got confused to modify the value or not but later i decided lets not modify the value and return the values of children directly to the parent hence simplyifying the question.