Who felt that the question(A) that came in Codeforces Round #828 (Div. 3) was a little trickier/harder than the problem that came in Educational Codeforces Round 137 (Rated for Div. 2). I am writing this because for the first time I was able to solve the Div -2 problem A during the contest and I was not able to solve the problem A that came in Div-3, but was able to solve the problem-B (Div-3) but not during the contest, because my code for problem-B was throwing TLE on test case 5 during the contest.