간단한 문제
Time Limit: 1 SecMemory Limit: 1024 MiB
Example Input 1
2 3
Example Output 1
62500001
Example Input 2
1 1
Example Output 2
500000004
Example Input 3
1 2
Example Output 3
333333336
Example Input 4
3 3
Example Output 4
578125005
Example Input 5
100000 1000000000
Example Output 5
249794093