When ?? was born, seven crows flew in and stopped beside him. In its childhood, ?? had been unfortunately fall into the sea. While it was dying, seven dolphins arched its body and sent it back to the shore. It is said that ?? used to surrounded by 7…

Lucky7 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 933    Accepted Submission(s): 345 Problem Description When ?? was born, seven crows flew in and stopped beside him. In its childhood, ?? h…