#include <bits/stdc++.h>
using namespace std;
typedef long long int64;
typedef pair<int,int> pii;
typedef pair<int64,int> pii32;
typedef pair<int64,int64> pii64;
#define PB push_back
#define MP make_pair
#define F first
#define S second
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
const int maxn = 1e5+10;
const int64 MO = 1e9+7;
const int64 IN = 1e9;
int64 dp[20][11][11];
int a[20];
int64 n, m;
int getl (int64 x) {
int res = 0;
while (x) {
res++;
x /= 10;
}
return res;
}
bool ok (int64 x) {
int len = getl(x);
for (int i = 0; i < len; i++) {
a[i] = x % 10;
x /= 10;
}
for (int i = 0; i < len - 1; i++)
if (a[i] == a[i + 1])
return 0;
for (int i = 0; i < len - 2; i++)
if (a[i] == a[i + 2])
return 0;
return 1;
}
int64 solve (int64 x) {
if (x == -1)
return 0;
if (x == 0)
return 1;
int len = getl(x);
memset(dp, 0, sizeof dp);
for (int i = 1; i < 10; i++)
dp[0][10][i] = 1;
int64 ans = ((len > 1) ? 9 : 0);
for (int i = 1; i < len - 1; i++) {
for (int t = 0; t <= 10; t++)
for (int j = 0; j <= 9; j++)
for (int k = 0; k <= 10; k++) {
if (j == t || j == k)
continue;
dp[i][t][j] += dp[i - 1][k][t];
}
for (int t = 0; t <= 10; t++)
for (int j = 0; j <= 10; j++)
ans += dp[i][t][j];
}
int64 tmp = x;
for (int l = len - 1; l >= 0; l--) {
a[l] = tmp % 10;
tmp /= 10;
}
for (int l = 0; l < len; l++) {
memset(dp, 0, sizeof dp);
if (l == 0)
for (int i = 1; i < a[0]; i++)
dp[0][10][i] = 1;
else
dp[0][10][a[0]] = 1;
for (int i = 1; i < len; i++)
for (int t = 0; t <= 10; t++)
for (int j = 0; j <= 9; j++)
for (int k = 0; k <= 10; k++) {
if (j == t || j == k)
continue;
if ((i == l && j >= a[i]) || (i < l && j != a[i]))
continue;
dp[i][t][j] += dp[i - 1][k][t];
}
for (int i = 0; i <= 10; i++)
for (int t = 0; t <= 10; t++)
ans += dp[len - 1][i][t];
}
if (ok(x))
ans++;
return ans + 1;
}
int main () {
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n >> m;
cout << solve(m) - solve(n - 1) << "\n";
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
384 KB |
Output is correct |
| 2 |
Correct |
2 ms |
384 KB |
Output is correct |
| 3 |
Correct |
3 ms |
384 KB |
Output is correct |
| 4 |
Correct |
2 ms |
384 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
2 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| 11 |
Correct |
2 ms |
384 KB |
Output is correct |
| 12 |
Correct |
2 ms |
384 KB |
Output is correct |
| 13 |
Correct |
2 ms |
384 KB |
Output is correct |
| 14 |
Correct |
2 ms |
384 KB |
Output is correct |
| 15 |
Correct |
2 ms |
384 KB |
Output is correct |
| 16 |
Correct |
2 ms |
384 KB |
Output is correct |
| 17 |
Correct |
2 ms |
384 KB |
Output is correct |
| 18 |
Correct |
2 ms |
384 KB |
Output is correct |
| 19 |
Correct |
3 ms |
384 KB |
Output is correct |
| 20 |
Correct |
2 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
384 KB |
Output is correct |
| 2 |
Correct |
3 ms |
384 KB |
Output is correct |
| 3 |
Correct |
3 ms |
396 KB |
Output is correct |
| 4 |
Correct |
4 ms |
384 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
3 ms |
384 KB |
Output is correct |
| 7 |
Correct |
2 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| 11 |
Correct |
2 ms |
384 KB |
Output is correct |
| 12 |
Correct |
2 ms |
384 KB |
Output is correct |
| 13 |
Correct |
2 ms |
384 KB |
Output is correct |
| 14 |
Correct |
2 ms |
392 KB |
Output is correct |
| 15 |
Correct |
2 ms |
384 KB |
Output is correct |
| 16 |
Correct |
3 ms |
384 KB |
Output is correct |
| 17 |
Correct |
3 ms |
384 KB |
Output is correct |
| 18 |
Correct |
3 ms |
384 KB |
Output is correct |
| 19 |
Correct |
3 ms |
384 KB |
Output is correct |
| 20 |
Correct |
3 ms |
384 KB |
Output is correct |
| 21 |
Correct |
3 ms |
384 KB |
Output is correct |
| 22 |
Correct |
3 ms |
384 KB |
Output is correct |
| 23 |
Correct |
3 ms |
384 KB |
Output is correct |
| 24 |
Correct |
3 ms |
384 KB |
Output is correct |
| 25 |
Correct |
3 ms |
384 KB |
Output is correct |
| 26 |
Correct |
3 ms |
384 KB |
Output is correct |
| 27 |
Correct |
4 ms |
384 KB |
Output is correct |
| 28 |
Correct |
3 ms |
384 KB |
Output is correct |
| 29 |
Correct |
3 ms |
384 KB |
Output is correct |
| 30 |
Correct |
3 ms |
384 KB |
Output is correct |
| 31 |
Correct |
3 ms |
384 KB |
Output is correct |
| 32 |
Correct |
3 ms |
384 KB |
Output is correct |
| 33 |
Correct |
3 ms |
384 KB |
Output is correct |
| 34 |
Correct |
3 ms |
384 KB |
Output is correct |
| 35 |
Correct |
3 ms |
384 KB |
Output is correct |
| 36 |
Correct |
3 ms |
384 KB |
Output is correct |
| 37 |
Correct |
3 ms |
384 KB |
Output is correct |
| 38 |
Correct |
3 ms |
384 KB |
Output is correct |
| 39 |
Correct |
3 ms |
384 KB |
Output is correct |
| 40 |
Correct |
3 ms |
384 KB |
Output is correct |
| 41 |
Correct |
3 ms |
412 KB |
Output is correct |
| 42 |
Correct |
4 ms |
384 KB |
Output is correct |
| 43 |
Correct |
3 ms |
384 KB |
Output is correct |
| 44 |
Correct |
4 ms |
384 KB |
Output is correct |
| 45 |
Correct |
3 ms |
384 KB |
Output is correct |
