#include <bits/stdc++.h>
using namespace std;
const int N = 20;
int n;
long long dp[N][2];
string s;
long long calc(int pos, int f, int c1, int c2, int c3) {
if((c2 == c3 && c2 != -1 && c3 != -1) || (c1 == c3 && c1 != -1 && c3 != -1)) return 0;
if(pos == n) return 1;
auto &res = dp[pos][f];
if(res != -1) {
return res;
}
res = 0;
int lmt = f ? 9 : s[pos] - '0';
for(int i = 0; i <= lmt; i++) {
int nf = f;
if(i < lmt) nf = 1;
res += calc(pos + 1, nf, c2, c3, i);
}
return res;
}
long long solve(string &x) {
s = x;
n = (int) x.size();
memset(dp, -1, sizeof dp);
return calc(0, 0, -1, -1, -1);
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
long long l, r;
cin >> l >> r;
l--;
string a, b;
a = to_string(l);
b = to_string(r);
cout << solve(b) - solve(a) << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
504 KB |
Output isn't correct |
| 2 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 5 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 6 |
Incorrect |
2 ms |
416 KB |
Output isn't correct |
| 7 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 8 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 9 |
Correct |
2 ms |
292 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
424 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 15 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
380 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 8 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 9 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 10 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 11 |
Correct |
2 ms |
252 KB |
Output is correct |
| 12 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 13 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 14 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 15 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
416 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
380 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
2 ms |
376 KB |
Output is correct |
| 32 |
Correct |
2 ms |
376 KB |
Output is correct |
| 33 |
Correct |
2 ms |
376 KB |
Output is correct |
| 34 |
Correct |
2 ms |
376 KB |
Output is correct |
| 35 |
Correct |
2 ms |
252 KB |
Output is correct |
| 36 |
Correct |
2 ms |
376 KB |
Output is correct |
| 37 |
Correct |
2 ms |
376 KB |
Output is correct |
| 38 |
Correct |
2 ms |
376 KB |
Output is correct |
| 39 |
Correct |
2 ms |
380 KB |
Output is correct |
| 40 |
Correct |
2 ms |
376 KB |
Output is correct |
| 41 |
Correct |
2 ms |
420 KB |
Output is correct |
| 42 |
Correct |
2 ms |
380 KB |
Output is correct |
| 43 |
Correct |
2 ms |
376 KB |
Output is correct |
| 44 |
Correct |
2 ms |
376 KB |
Output is correct |
| 45 |
Correct |
2 ms |
376 KB |
Output is correct |
