Being tired participate Codeforces round Gildong decide rest park he sit bench soon find rabbit hop one rabbit tall otherHe notice rabbit hop the position rabbit represent integer coordinate horizontal line the tall rabbit currently position x short rabbit currently position y x lt y every second rabbit hop position the tall rabbit hop positive direction short rabbit hop negative direction b for example let x0 y10 a2 b3 at 1st second rabbit position 2 7 at 2nd second rabbit position 4Gildong wonder will rabbits position moment if long Lets find moment time second rabbit point