def palin(x):
x = str(x)
for i in range(len(x)-1):
if x[i] == x[i+1]: return True
for i in range(len(x)-2):
if x[i] == x[i+2]: return True
return False
def dp(flag,prev,prev2,d):
if d==cur:
return 1
if dps[flag][prev][prev2][d] != -1:
return dps[flag][prev][prev2][d]
ans = 0
if flag:
for i in range(sus[d+1]+1):
if prev==10 and i==0: i = 10
if i==prev and i!=10: continue
if i==prev2 and i!=10: continue
if i==sus[d+1]:
ans += dp(1,i,prev,d+1)
else:
ans += dp(0,i,prev,d+1)
else:
for i in range(10):
if prev==10 and i==0: i = 10
if prev == i and i!=10: continue
if i==prev2 and i!=10: continue
ans += dp(0,i,prev,d+1)
dps[flag][prev][prev2][d] = ans
return ans
a,b = map(int, input().split())
sus = [-1]+[int(i) for i in str(a)]
cur = len(sus)-1
dps= [[[[-1 for i in range(19)]for i in range(11)]for i in range(11)]for i in range(2)]
aa = dp(1,10,10,0)
sus = [-1]+[int(i) for i in str(b)]
cur = len(sus)-1
dps= [[[[-1 for i in range(19)]for i in range(11)]for i in range(11)]for i in range(2)]
bb = dp(1,10,10,0)
if not palin(a):
aa -= 1
print(bb-aa)
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
38 ms |
18856 KB |
Output is correct |
| 2 |
Correct |
42 ms |
18816 KB |
Output is correct |
| 3 |
Correct |
72 ms |
20932 KB |
Output is correct |
| 4 |
Correct |
47 ms |
19408 KB |
Output is correct |
| 5 |
Correct |
40 ms |
19004 KB |
Output is correct |
| 6 |
Correct |
41 ms |
18928 KB |
Output is correct |
| 7 |
Correct |
38 ms |
18852 KB |
Output is correct |
| 8 |
Correct |
38 ms |
18892 KB |
Output is correct |
| 9 |
Correct |
38 ms |
18860 KB |
Output is correct |
| 10 |
Correct |
42 ms |
18896 KB |
Output is correct |
| 11 |
Correct |
51 ms |
19876 KB |
Output is correct |
| 12 |
Correct |
51 ms |
19780 KB |
Output is correct |
| 13 |
Correct |
38 ms |
18844 KB |
Output is correct |
| 14 |
Correct |
51 ms |
19484 KB |
Output is correct |
| 15 |
Correct |
44 ms |
19484 KB |
Output is correct |
| 16 |
Correct |
63 ms |
20208 KB |
Output is correct |
| 17 |
Correct |
70 ms |
20220 KB |
Output is correct |
| 18 |
Correct |
45 ms |
18876 KB |
Output is correct |
| 19 |
Correct |
67 ms |
20984 KB |
Output is correct |
| 20 |
Correct |
47 ms |
19920 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
79 ms |
20512 KB |
Output is correct |
| 2 |
Correct |
73 ms |
20984 KB |
Output is correct |
| 3 |
Correct |
83 ms |
21448 KB |
Output is correct |
| 4 |
Correct |
67 ms |
20804 KB |
Output is correct |
| 5 |
Correct |
56 ms |
20108 KB |
Output is correct |
| 6 |
Correct |
64 ms |
20516 KB |
Output is correct |
| 7 |
Correct |
58 ms |
20440 KB |
Output is correct |
| 8 |
Correct |
56 ms |
20572 KB |
Output is correct |
| 9 |
Correct |
50 ms |
20440 KB |
Output is correct |
| 10 |
Correct |
55 ms |
20264 KB |
Output is correct |
| 11 |
Correct |
67 ms |
20608 KB |
Output is correct |
| 12 |
Correct |
55 ms |
20268 KB |
Output is correct |
| 13 |
Correct |
62 ms |
20724 KB |
Output is correct |
| 14 |
Correct |
57 ms |
20148 KB |
Output is correct |
| 15 |
Correct |
53 ms |
20300 KB |
Output is correct |
| 16 |
Correct |
67 ms |
21416 KB |
Output is correct |
| 17 |
Correct |
80 ms |
21588 KB |
Output is correct |
| 18 |
Correct |
74 ms |
21472 KB |
Output is correct |
| 19 |
Correct |
67 ms |
21452 KB |
Output is correct |
| 20 |
Correct |
79 ms |
21448 KB |
Output is correct |
| 21 |
Correct |
67 ms |
21388 KB |
Output is correct |
| 22 |
Correct |
67 ms |
20900 KB |
Output is correct |
| 23 |
Correct |
66 ms |
20912 KB |
Output is correct |
| 24 |
Correct |
74 ms |
21636 KB |
Output is correct |
| 25 |
Correct |
67 ms |
21020 KB |
Output is correct |
| 26 |
Correct |
71 ms |
21472 KB |
Output is correct |
| 27 |
Correct |
69 ms |
21452 KB |
Output is correct |
| 28 |
Correct |
66 ms |
21428 KB |
Output is correct |
| 29 |
Correct |
65 ms |
21312 KB |
Output is correct |
| 30 |
Correct |
66 ms |
21312 KB |
Output is correct |
| 31 |
Correct |
70 ms |
21568 KB |
Output is correct |
| 32 |
Correct |
69 ms |
21664 KB |
Output is correct |
| 33 |
Correct |
68 ms |
20928 KB |
Output is correct |
| 34 |
Correct |
68 ms |
21468 KB |
Output is correct |
| 35 |
Correct |
67 ms |
20808 KB |
Output is correct |
| 36 |
Correct |
69 ms |
21412 KB |
Output is correct |
| 37 |
Correct |
71 ms |
21076 KB |
Output is correct |
| 38 |
Correct |
88 ms |
20560 KB |
Output is correct |
| 39 |
Correct |
71 ms |
20808 KB |
Output is correct |
| 40 |
Correct |
66 ms |
21320 KB |
Output is correct |
| 41 |
Correct |
67 ms |
21504 KB |
Output is correct |
| 42 |
Correct |
67 ms |
21456 KB |
Output is correct |
| 43 |
Correct |
72 ms |
21428 KB |
Output is correct |
| 44 |
Correct |
67 ms |
20632 KB |
Output is correct |
| 45 |
Correct |
72 ms |
21472 KB |
Output is correct |
