Hi , I am a beginner programmer and i need some help . Basically i was working on a problem on codeforces (Problem Link-> http://codeforces.com/problemset/problem/600/B)(using java) and i am getting TLE verdict. I am not able to understand why i am getting so as I am using map for insertion and retrieval of values which is a form of red black tree and takes logarithmic time . My code is exceeding limit on test 20 .. Submission link->http://codeforces.com/contest/600/submission/23908885
Please help me in understanding the reason behind this and if possible , also tell about how to overcome this problem of Time Limit..