../preliminary/01   l = 1 r = 100 sample test #1
../tests/subtask1/01   l = 1 r = 1 
../tests/subtask1/02   l = 1 r = 9 
../tests/subtask1/03   l = 1 r = 1000 
../tests/subtask1/04   l = 1 r = 999 
../tests/subtask1/05   l = 1 r = 99 
../tests/subtask1/06   l = 1 r = 123 
../tests/subtask1/07   l = 1 r = 987 
../tests/subtask1/08   l = 1 r = 605 minimum digit in the middle
../tests/subtask1/09   l = 1 r = 506 minimum digit in the middle
../tests/subtask1/10   l = 1 r = 482 maximum digit in the middle
../tests/subtask1/11   l = 1 r = 284 maximum digit in the middle
../tests/subtask1/12   l = 1 r = 224 random test
../tests/subtask1/13   l = 1 r = 141 random test
../tests/subtask1/14   l = 1 r = 431 random test
../tests/subtask1/15   l = 1 r = 674 random test
../tests/subtask1/16   l = 1 r = 162 random test
../tests/subtask2/17   l = 1 r has 19 digits 
../tests/subtask2/18   l = 1 r has 18 digits 
../tests/subtask2/19   l has 17 digits r has 17 digits answer must be zero
../tests/subtask2/20   l = 81968291 r has 18 digits digits of r increase
../tests/subtask2/21   l has 18 digits r has 18 digits answer must be one
../tests/subtask2/22   l = 507581533 r has 18 digits incr in 12 prefix of r
../tests/subtask2/23   l = 879225948 r has 18 digits incr in 5 prefix of r
../tests/subtask2/24   l = 882879496 r has 18 digits digits of r decrease
../tests/subtask2/25   l has 17 digits r has 18 digits random test
../tests/subtask2/26   l has 17 digits r has 18 digits random test
../tests/subtask2/27   l has 17 digits r has 18 digits random test
../tests/subtask3/28   l = 1 r has 101 digits r = 10^100
../tests/subtask3/29   l = 1 r has 81 digits r = 10^80
../tests/subtask3/30   l = 1 r has 46 digits r = 10^45
../tests/subtask3/31   l = 1 r has 86 digits r = 10^85
../tests/subtask3/32   l = 1 r has 98 digits r = 10^97
../tests/subtask3/33   l = 1 r has 65 digits r = 10^64
../tests/subtask3/34   l = 1 r has 41 digits r = 10^40
../tests/subtask3/35   l = 1 r has 89 digits r = 10^88
../tests/subtask4/36   l = 1 r has 100 digits 
../tests/subtask4/37   l = 1 r has 100 digits digits of r increase
../tests/subtask4/38   l has 100 digits r has 101 digits digits of l increase
../tests/subtask4/39   l has 49 digits r has 100 digits digits of r decrease
../tests/subtask4/40   l = 647427374 r has 100 digits incr in 25 prefix of r
../tests/subtask4/41   l = 870595384 r has 100 digits incr in 50 prefix of r
../tests/subtask4/42   l = 418322612 r has 100 digits incr in 90 prefix of r
../tests/subtask4/43   l has 49 digits r has 100 digits random test
../tests/subtask4/44   l has 70 digits r has 100 digits random test
../tests/subtask4/45   l has 90 digits r has 100 digits random test
../tests/subtask4/46   l has 100 digits r has 100 digits random test
