#include <bits/stdc++.h>
using namespace std;
long long dp[19][11][11][2][2];
string num;
long long rec(int pos, int prev1, int prev2, int f, int prev) {
if(pos == num.size()) return 1;
if(dp[pos][prev1][prev2][prev][f] != -1) return dp[pos][prev1][prev2][prev][f];
int LIM = 9;
if(!f) LIM = num[pos] - '0';
long long res = 0;
for (int i = 0; i<=LIM; i++) {
if(prev) {
if(i == prev2 || i == prev1) continue;
res += rec(pos + 1, i, prev1, (f || i < LIM), prev);
}
else {
res += rec(pos + 1, i, prev1, (f || i < LIM), (i != 0));
}
}
return dp[pos][prev1][prev2][f][prev] = res;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
long long a,b, k = 0;
cin >> a >> b;
if(a == 0) k += 1;
memset(dp, -1, sizeof(dp)); num = to_string(b);
b = rec(0, 10, 10, 0, 0);
a = max(a-1, 0LL);
memset(dp, -1, sizeof(dp)); num = to_string(a);
cout << b - rec(0, 10, 10, 0, 0) + k << '\n';
return 0;
}
Compilation message
numbers.cpp: In function 'long long int rec(int, int, int, int, int)':
numbers.cpp:10:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
10 | if(pos == num.size()) return 1;
| ~~~~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 7 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 9 |
Correct |
0 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 15 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
0 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 8 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 9 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 10 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 14 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 16 |
Correct |
0 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
0 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
1 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
0 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
340 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
1 ms |
340 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
1 ms |
340 KB |
Output is correct |
| 36 |
Correct |
1 ms |
340 KB |
Output is correct |
| 37 |
Correct |
1 ms |
340 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
340 KB |
Output is correct |
| 40 |
Correct |
0 ms |
340 KB |
Output is correct |
| 41 |
Correct |
0 ms |
340 KB |
Output is correct |
| 42 |
Correct |
0 ms |
340 KB |
Output is correct |
| 43 |
Correct |
1 ms |
340 KB |
Output is correct |
| 44 |
Correct |
0 ms |
340 KB |
Output is correct |
| 45 |
Correct |
1 ms |
340 KB |
Output is correct |
