My accepted program gives below answers for tests:

Test:
1919 1000000000

Answer:
0: 0
1: 427499181
2: 424999184
3: 147499717
4: 0
5: 0
6: 0
7: 0
8: 0
9: 0
10: 0
11: 0
12: 0


Test:
100000 2000000

Answer:
0: 0
1: 812251
2: 807500
3: 280250
4: 0
5: 0
6: 0
7: 0
8: 0
9: 0
10: 0
11: 0
12: 0

Have you used info that Gregorian calendar repeated for each 400 years?

test:
9876 9876

answer:
0: 0
1: 1
2: 0
3: 0
4: 0
5: 0
6: 0
7: 0
8: 0
9: 0
10: 0
11: 0
12: 0

test:
1234567890 987654321012345678909876543210123456789

answer:
0: 0
1: 422222222232777777733972222221800000004
2: 419753086430246913536697530863777777784
3: 145679012349320987639206790123311111112
4: 0
5: 0
6: 0
7: 0
8: 0
9: 0
10: 0
11: 0
12: 0

Right or wrong?

Edited by author 27.05.2020 11:35