Here is my submission : 83990283

As you can see for the Test case 1, (sample test case), string "bbc" cannot be obtained from "abac", then, why is verdict "OK"?

Can someone explain what exactly happened here?

(If it showed WA during the contest, I would have easily corrected my code)

(The guy who hacked my code, used the sample test case https://codeforces.me/contest/1367/hacks/651742)