a, b = map(int, input().split())
dp = [[[0 for i in range(11)] for i in range(11)] for i in range(20)]
dp[0][10][10] = 1
for dig in range(1, 19):
for cur in range(10):
for prev in range(11):
if cur == prev:
continue
for prev2 in range(11):
if prev2 == cur:
continue
dp[dig][cur][prev] += dp[dig-1][prev][prev2]
## dig = 1
##d = 5
"""
ans = 1
for dig in range(1, d+1):
for cur in range(1, 11):
for prev in range(11):
ans += dp[dig][cur][prev]
"""
def solve(x):
if x == 0:
return 0
ans = 1
x = list(str(x))
for dig in range(1, len(x)):
for cur in range(1, 11):
for prev in range(11):
ans += dp[dig][cur][prev]
#print(ans)
chk = [11,11]
for i, ch in enumerate(x):
d = len(x) - i
#print(d, ch)
val = int(ch)
for cur in range(0, val):
if chk[-1] == 11 and cur == 0:
continue
if cur == chk[-1] or cur == chk[-2]:
continue
for prev in range(11):
if prev == chk[-1]: continue
ans += dp[d][cur][prev]
#print(ans)
chk[-2] = chk[-1]
chk[-1] = val
return ans
print(solve(b+1)-solve(a))
#print(ans, ans_brute)
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
48 ms |
19496 KB |
Output is correct |
| 2 |
Correct |
46 ms |
19404 KB |
Output is correct |
| 3 |
Incorrect |
52 ms |
19804 KB |
Output isn't correct |
| 4 |
Correct |
48 ms |
19488 KB |
Output is correct |
| 5 |
Correct |
48 ms |
19416 KB |
Output is correct |
| 6 |
Correct |
47 ms |
19464 KB |
Output is correct |
| 7 |
Correct |
49 ms |
19396 KB |
Output is correct |
| 8 |
Correct |
51 ms |
19496 KB |
Output is correct |
| 9 |
Correct |
48 ms |
19412 KB |
Output is correct |
| 10 |
Correct |
47 ms |
19496 KB |
Output is correct |
| 11 |
Correct |
49 ms |
19480 KB |
Output is correct |
| 12 |
Correct |
47 ms |
19476 KB |
Output is correct |
| 13 |
Incorrect |
53 ms |
19408 KB |
Output isn't correct |
| 14 |
Correct |
49 ms |
19496 KB |
Output is correct |
| 15 |
Correct |
58 ms |
19492 KB |
Output is correct |
| 16 |
Incorrect |
50 ms |
19692 KB |
Output isn't correct |
| 17 |
Correct |
50 ms |
19732 KB |
Output is correct |
| 18 |
Correct |
46 ms |
19464 KB |
Output is correct |
| 19 |
Incorrect |
51 ms |
19796 KB |
Output isn't correct |
| 20 |
Incorrect |
47 ms |
19412 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
50 ms |
19648 KB |
Output isn't correct |
| 2 |
Incorrect |
57 ms |
19788 KB |
Output isn't correct |
| 3 |
Incorrect |
52 ms |
19780 KB |
Output isn't correct |
| 4 |
Incorrect |
53 ms |
19784 KB |
Output isn't correct |
| 5 |
Correct |
53 ms |
19612 KB |
Output is correct |
| 6 |
Incorrect |
51 ms |
19624 KB |
Output isn't correct |
| 7 |
Incorrect |
52 ms |
19608 KB |
Output isn't correct |
| 8 |
Incorrect |
56 ms |
19624 KB |
Output isn't correct |
| 9 |
Incorrect |
48 ms |
19556 KB |
Output isn't correct |
| 10 |
Correct |
48 ms |
19496 KB |
Output is correct |
| 11 |
Incorrect |
49 ms |
19660 KB |
Output isn't correct |
| 12 |
Incorrect |
50 ms |
19664 KB |
Output isn't correct |
| 13 |
Incorrect |
50 ms |
19620 KB |
Output isn't correct |
| 14 |
Correct |
49 ms |
19608 KB |
Output is correct |
| 15 |
Incorrect |
57 ms |
19604 KB |
Output isn't correct |
| 16 |
Incorrect |
56 ms |
19784 KB |
Output isn't correct |
| 17 |
Incorrect |
59 ms |
19848 KB |
Output isn't correct |
| 18 |
Incorrect |
53 ms |
19760 KB |
Output isn't correct |
| 19 |
Incorrect |
55 ms |
19840 KB |
Output isn't correct |
| 20 |
Incorrect |
53 ms |
19972 KB |
Output isn't correct |
| 21 |
Incorrect |
52 ms |
19808 KB |
Output isn't correct |
| 22 |
Incorrect |
52 ms |
19760 KB |
Output isn't correct |
| 23 |
Incorrect |
51 ms |
19752 KB |
Output isn't correct |
| 24 |
Incorrect |
53 ms |
19808 KB |
Output isn't correct |
| 25 |
Incorrect |
51 ms |
19852 KB |
Output isn't correct |
| 26 |
Incorrect |
51 ms |
19804 KB |
Output isn't correct |
| 27 |
Incorrect |
59 ms |
19784 KB |
Output isn't correct |
| 28 |
Incorrect |
52 ms |
19748 KB |
Output isn't correct |
| 29 |
Incorrect |
50 ms |
19624 KB |
Output isn't correct |
| 30 |
Incorrect |
51 ms |
19800 KB |
Output isn't correct |
| 31 |
Incorrect |
52 ms |
19812 KB |
Output isn't correct |
| 32 |
Incorrect |
51 ms |
19852 KB |
Output isn't correct |
| 33 |
Incorrect |
56 ms |
19624 KB |
Output isn't correct |
| 34 |
Incorrect |
55 ms |
19752 KB |
Output isn't correct |
| 35 |
Incorrect |
52 ms |
19864 KB |
Output isn't correct |
| 36 |
Incorrect |
52 ms |
19844 KB |
Output isn't correct |
| 37 |
Incorrect |
52 ms |
19832 KB |
Output isn't correct |
| 38 |
Incorrect |
51 ms |
19852 KB |
Output isn't correct |
| 39 |
Incorrect |
51 ms |
19768 KB |
Output isn't correct |
| 40 |
Incorrect |
55 ms |
19864 KB |
Output isn't correct |
| 41 |
Incorrect |
51 ms |
19728 KB |
Output isn't correct |
| 42 |
Incorrect |
55 ms |
19824 KB |
Output isn't correct |
| 43 |
Incorrect |
58 ms |
19820 KB |
Output isn't correct |
| 44 |
Incorrect |
55 ms |
19776 KB |
Output isn't correct |
| 45 |
Incorrect |
54 ms |
19840 KB |
Output isn't correct |
