{"action":"opened","issue":{"url":"https://api.github.com/repos/appirio-tech/arena-web/issues/601","labels_url":"https://api.github.com/repos/appirio-tech/arena-web/issues/601/labels{/name}","comments_url":"https://api.github.com/repos/appirio-tech/arena-web/issues/601/comments","events_url":"https://api.github.com/repos/appirio-tech/arena-web/issues/601/events","html_url":"https://github.com/appirio-tech/arena-web/issues/601","id":109932674,"number":601,"title":"Clarification regarding ABBAdiv1 problem","user":{"login":"kishorechalla","id":14990192,"avatar_url":"https://avatars.githubusercontent.com/u/14990192?v=3","gravatar_id":"","url":"https://api.github.com/users/kishorechalla","html_url":"https://github.com/kishorechalla","followers_url":"https://api.github.com/users/kishorechalla/followers","following_url":"https://api.github.com/users/kishorechalla/following{/other_user}","gists_url":"https://api.github.com/users/kishorechalla/gists{/gist_id}","starred_url":"https://api.github.com/users/kishorechalla/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kishorechalla/subscriptions","organizations_url":"https://api.github.com/users/kishorechalla/orgs","repos_url":"https://api.github.com/users/kishorechalla/repos","events_url":"https://api.github.com/users/kishorechalla/events{/privacy}","received_events_url":"https://api.github.com/users/kishorechalla/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-10-06T04:15:50Z","updated_at":"2015-10-06T04:15:50Z","closed_at":null,"body":"Hi everyone, I am new to TopCoder.arena and started with easy problems. I have this question while trying to solve ABBAdiv1 problem.\r\n\r\nfinding difficult to solve example testcase4 and logically it should return Impossible. But testcase is given as possible. Below are the steps I tried.\r\n1. initial = AAABBAABB       target = BAABAAABAABAABBBAAAAAABBAABBBBBBBABB\r\n\r\n2. append A at end AAABBAABBA: fail because there is no substring of the same in target.\r\n\r\n3. append B at end and reverse BBBAABBAAA: fail because there no substring of the same in target.\r\n\r\nSince we couldn't go further from here, logically program should return Impossible which is showing wrong for.\r\n\r\nCan anyone please correct me if I am wrong and give me correct steps. Any help is appreciated."}}