arr = [x for x in input().split()]
n = int(arr[0])
m = int(arr[1])
if (n > m) :
print(n - m)
else :
cnt = 0
while (m > n):
if (m % 2 == 0):
m /= 2
else :
m += 1
cnt += 1
cnt += n - m
print(int(cnt))
1720A - Burenka Plays with Fractions | 3A - Shortest path of the king |
1720C - Corners | 574A - Bear and Elections |
352B - Jeff and Periods | 1244A - Pens and Pencils |
1670A - Prof Slim | 1189A - Keanu Reeves |
678A - Johny Likes Numbers | 1699C - The Third Problem |
1697D - Guess The String | 754B - Ilya and tic-tac-toe game |
760A - Petr and a calendar | 1573A - Countdown |
166A - Rank List | 1631B - Fun with Even Subarrays |
727A - Transformation from A to B | 822B - Crossword solving |
1623A - Robot Cleaner | 884B - Japanese Crosswords Strike Back |
862B - Mahmoud and Ehab and the bipartiteness | 429A - Xor-tree |
1675C - Detective Task | 950A - Left-handers Right-handers and Ambidexters |
672B - Different is Good | 1C - Ancient Berland Circus |
721A - One-dimensional Japanese Crossword | 1715B - Beautiful Array |
60B - Serial Time | 453A - Little Pony and Expected Maximum |