#include <bits/stdc++.h>
/*
unsigned seed1 = std::chrono::system_clock::now().time_since_epoch().count();
mt19937 g1.seed(seed1);
ios_base::sync_with_stdio(false);
cin.tie(NULL);
*/
using namespace std;
const double PI = 2 * acos(0);
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<vector<ll>> matrix;
ll dp[25][11][11][2][2];
bool seen[25][11][11][2][2];
ll solve(vector<int>& digits, int idx, int a, int b, int constrained, int first) {
if(seen[idx][a][b][constrained][first]) return dp[idx][a][b][constrained][first];
seen[idx][a][b][constrained][first] = true;
if(idx == digits.size()) {
dp[idx][a][b][constrained][first] = 1;
return 1;
}
for(int i = 0; i <= 9 && (i <= digits[idx] || !constrained); i++) {
if(i == a || i == b) continue;
int nc = constrained == 1 && i == digits[idx] ? 1 : 0;
int nf = first == 0 || i > 0 ? 0 : 1;
int na = i == 0 && first ? a : b;
int nb = i == 0 && first ? b : i;
dp[idx][a][b][constrained][first] += solve(digits, idx+1, na, nb, nc, nf);
}
return dp[idx][a][b][constrained][first];
}
ll solve(ll n) {
if(n < 0) return 0;
vector<int> digits;
while(n) {
digits.push_back(n%10);
n /= 10;
}
reverse(digits.begin(), digits.end());
memset(dp, 0, sizeof(dp));
memset(seen, 0, sizeof(seen));
return solve(digits, 0, 10, 10, 1, 1);
}
int main() {
ll a, b;
scanf("%lld %lld", &a, &b);
printf("%lld\n", solve(b) - solve(a-1));
}
Compilation message
numbers.cpp: In function 'll solve(std::vector<int>&, int, int, int, int, int)':
numbers.cpp:27:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(idx == digits.size()) {
~~~~^~~~~~~~~~~~~~~~
numbers.cpp: In function 'int main()':
numbers.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &a, &b);
~~~~~^~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
508 KB |
Output is correct |
| 3 |
Correct |
2 ms |
508 KB |
Output is correct |
| 4 |
Correct |
2 ms |
544 KB |
Output is correct |
| 5 |
Correct |
2 ms |
544 KB |
Output is correct |
| 6 |
Correct |
2 ms |
544 KB |
Output is correct |
| 7 |
Correct |
2 ms |
592 KB |
Output is correct |
| 8 |
Correct |
2 ms |
592 KB |
Output is correct |
| 9 |
Correct |
2 ms |
592 KB |
Output is correct |
| 10 |
Correct |
2 ms |
592 KB |
Output is correct |
| 11 |
Correct |
2 ms |
592 KB |
Output is correct |
| 12 |
Correct |
2 ms |
592 KB |
Output is correct |
| 13 |
Correct |
2 ms |
632 KB |
Output is correct |
| 14 |
Correct |
2 ms |
632 KB |
Output is correct |
| 15 |
Correct |
2 ms |
720 KB |
Output is correct |
| 16 |
Correct |
2 ms |
720 KB |
Output is correct |
| 17 |
Correct |
2 ms |
720 KB |
Output is correct |
| 18 |
Correct |
2 ms |
720 KB |
Output is correct |
| 19 |
Correct |
2 ms |
720 KB |
Output is correct |
| 20 |
Correct |
2 ms |
720 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
720 KB |
Output is correct |
| 2 |
Correct |
2 ms |
720 KB |
Output is correct |
| 3 |
Correct |
2 ms |
720 KB |
Output is correct |
| 4 |
Correct |
3 ms |
720 KB |
Output is correct |
| 5 |
Correct |
2 ms |
748 KB |
Output is correct |
| 6 |
Correct |
2 ms |
748 KB |
Output is correct |
| 7 |
Correct |
2 ms |
748 KB |
Output is correct |
| 8 |
Correct |
2 ms |
748 KB |
Output is correct |
| 9 |
Correct |
2 ms |
748 KB |
Output is correct |
| 10 |
Correct |
2 ms |
748 KB |
Output is correct |
| 11 |
Correct |
2 ms |
748 KB |
Output is correct |
| 12 |
Correct |
2 ms |
748 KB |
Output is correct |
| 13 |
Correct |
3 ms |
748 KB |
Output is correct |
| 14 |
Correct |
3 ms |
748 KB |
Output is correct |
| 15 |
Correct |
2 ms |
748 KB |
Output is correct |
| 16 |
Correct |
3 ms |
748 KB |
Output is correct |
| 17 |
Correct |
3 ms |
748 KB |
Output is correct |
| 18 |
Correct |
2 ms |
748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
748 KB |
Output is correct |
| 20 |
Correct |
2 ms |
748 KB |
Output is correct |
| 21 |
Correct |
2 ms |
748 KB |
Output is correct |
| 22 |
Correct |
2 ms |
748 KB |
Output is correct |
| 23 |
Correct |
2 ms |
748 KB |
Output is correct |
| 24 |
Correct |
2 ms |
748 KB |
Output is correct |
| 25 |
Correct |
2 ms |
748 KB |
Output is correct |
| 26 |
Correct |
2 ms |
748 KB |
Output is correct |
| 27 |
Correct |
2 ms |
748 KB |
Output is correct |
| 28 |
Correct |
2 ms |
748 KB |
Output is correct |
| 29 |
Correct |
2 ms |
748 KB |
Output is correct |
| 30 |
Correct |
2 ms |
748 KB |
Output is correct |
| 31 |
Correct |
2 ms |
748 KB |
Output is correct |
| 32 |
Correct |
2 ms |
748 KB |
Output is correct |
| 33 |
Correct |
2 ms |
748 KB |
Output is correct |
| 34 |
Correct |
2 ms |
748 KB |
Output is correct |
| 35 |
Correct |
2 ms |
748 KB |
Output is correct |
| 36 |
Correct |
2 ms |
748 KB |
Output is correct |
| 37 |
Correct |
2 ms |
748 KB |
Output is correct |
| 38 |
Correct |
3 ms |
748 KB |
Output is correct |
| 39 |
Correct |
2 ms |
748 KB |
Output is correct |
| 40 |
Correct |
2 ms |
748 KB |
Output is correct |
| 41 |
Correct |
2 ms |
748 KB |
Output is correct |
| 42 |
Correct |
2 ms |
748 KB |
Output is correct |
| 43 |
Correct |
2 ms |
748 KB |
Output is correct |
| 44 |
Correct |
2 ms |
748 KB |
Output is correct |
| 45 |
Correct |
2 ms |
748 KB |
Output is correct |
