Problem 1A
Test 1
 9 15
Solution
 60
Test 2
 10 20
Solution
 135
Test 3
 8 14
Solution
 55
Test 4
 8 9
Solution
 0
Test 5
 10 130
Solution
 8330
Test 6
 2 140
Solution
 9727
Test 7
 1 30000
Solution
 449984999