#include <bits/stdc++.h>
#define ll long long
#define rep(i, n, m) for (ll i = n; i <= m; i ++)
#define rrep(i, n, m) for (ll i = n; i >= m; i --)
using namespace std;
string toString(ll x) {
string ans;
if (x == 0) return "0";
while (x) ans += x % 10, x /= 10;
reverse(ans.begin(), ans.end());
return ans;
}
ll dp[20][11][11][2][2];
vector <int> num;
ll cal(ll pos, ll x1, ll x2, bool f, bool palin) {
if (palin) return 0;
if (pos == num.size()) return 1;
ll &ret = dp[pos][x1 + 1][x2 + 1][f][palin];
if (ret != -1) return ret;
ret = 0;
int lmt = num[pos];
if (f) lmt = 9;
rep(i, 0, lmt) {
bool new_f = f;
bool new_palin = palin;
if (i < lmt) new_f = true;
if (i == x2 || i == x1) new_palin = true;
ret += cal(pos + 1, x2, (x2 == -1 && i == 0 ? -1 : i), new_f, new_palin);
}
return ret;
}
ll solve(ll x) {
if (x == 0) return 1;
if (x < 0) return 0;
num.clear();
while(x) num.push_back(x % 10), x /= 10;
reverse(num.begin(), num.end());
memset(dp, -1, sizeof dp);
return cal(0, -1, -1, 0, 0);
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
//freopen("B.inp", "r", stdin);
//freopen("B.out", "w", stdout);
ll a, b, ans = 0;
cin >> a >> b;
//cout << solve(b) << ' ' << solve(a - 1) << '\n';
cout << solve(b) - solve(a - 1);
return 0;
}
Compilation message
numbers.cpp: In function 'long long int cal(long long int, long long int, long long int, bool, bool)':
numbers.cpp:21:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | if (pos == num.size()) return 1;
| ~~~~^~~~~~~~~~~~~
numbers.cpp: In function 'int main()':
numbers.cpp:59:14: warning: unused variable 'ans' [-Wunused-variable]
59 | ll a, b, ans = 0;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 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 |
Correct |
1 ms |
320 KB |
Output is correct |
| 6 |
Correct |
1 ms |
324 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
324 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
320 KB |
Output is correct |
| 13 |
Correct |
0 ms |
320 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
320 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
2 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
324 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
324 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
320 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
324 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 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 |
356 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 |
384 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
1 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 |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
324 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 |
316 KB |
Output is correct |
| 36 |
Correct |
1 ms |
384 KB |
Output is correct |
| 37 |
Correct |
1 ms |
360 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
340 KB |
Output is correct |
| 40 |
Correct |
1 ms |
340 KB |
Output is correct |
| 41 |
Correct |
1 ms |
340 KB |
Output is correct |
| 42 |
Correct |
1 ms |
340 KB |
Output is correct |
| 43 |
Correct |
1 ms |
324 KB |
Output is correct |
| 44 |
Correct |
1 ms |
320 KB |
Output is correct |
| 45 |
Correct |
2 ms |
328 KB |
Output is correct |
