#include <bits/stdc++.h>
#define MOD 1000000007
#define INF 1061109567
#define int long long
#define __builtin_popcount __builtin_popcountll
#define pb push_back
#define in(s) freopen(s,"r",stdin);
#define out(s) freopen(s,"w",stdout);
#define fi first
#define se second
#define bw(i,r,l) for (int i=r-1;i>=l;i--)
#define fw(i,l,r) for (int i=l;i<r;i++)
#define fa(i,x) for (auto i:x)
using namespace std;
int a, b, dig[25], dp[25][11][11][2];
int solve(int i, int j, int k, bool flag, bool beg) {
if (!i) return 1;
if (dp[i][j][k][beg] != -1 && !flag) return dp[i][j][k][beg];
int n = (flag ? dig[i] : 9), ans = 0;
fw (nxt, 0, n + 1) if (nxt != j && nxt != k) {
if (!beg && nxt == 0) ans += solve(i - 1, 10, 10, flag && nxt == n ? 1 : 0, 0);
else ans += solve(i - 1, nxt, j, flag && nxt == n ? 1 : 0, 1);
}
if (!flag) dp[i][j][k][beg] = ans;
return ans;
}
int calc(int r) {
if (r == -1) return 0;
int cnt = 0;
while (r) {
dig[++cnt] = r % 10;
r /= 10;
}
return solve(cnt, 10, 10, 1, 0);
}
signed main() {
#ifdef aome
in("aome.inp");
#endif
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> a >> b;
memset(dp, -1, sizeof dp);
cout << calc(b) - calc(a - 1) << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
380 KB |
Output is correct |
| 2 |
Correct |
2 ms |
556 KB |
Output is correct |
| 3 |
Correct |
2 ms |
556 KB |
Output is correct |
| 4 |
Correct |
2 ms |
620 KB |
Output is correct |
| 5 |
Correct |
2 ms |
620 KB |
Output is correct |
| 6 |
Correct |
2 ms |
620 KB |
Output is correct |
| 7 |
Correct |
2 ms |
620 KB |
Output is correct |
| 8 |
Correct |
2 ms |
620 KB |
Output is correct |
| 9 |
Correct |
2 ms |
620 KB |
Output is correct |
| 10 |
Correct |
2 ms |
620 KB |
Output is correct |
| 11 |
Correct |
2 ms |
620 KB |
Output is correct |
| 12 |
Correct |
2 ms |
648 KB |
Output is correct |
| 13 |
Correct |
2 ms |
648 KB |
Output is correct |
| 14 |
Correct |
2 ms |
648 KB |
Output is correct |
| 15 |
Correct |
2 ms |
648 KB |
Output is correct |
| 16 |
Correct |
2 ms |
648 KB |
Output is correct |
| 17 |
Correct |
2 ms |
684 KB |
Output is correct |
| 18 |
Correct |
2 ms |
684 KB |
Output is correct |
| 19 |
Correct |
2 ms |
684 KB |
Output is correct |
| 20 |
Correct |
2 ms |
684 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
688 KB |
Output is correct |
| 2 |
Correct |
2 ms |
688 KB |
Output is correct |
| 3 |
Correct |
2 ms |
688 KB |
Output is correct |
| 4 |
Correct |
2 ms |
688 KB |
Output is correct |
| 5 |
Correct |
2 ms |
688 KB |
Output is correct |
| 6 |
Correct |
2 ms |
688 KB |
Output is correct |
| 7 |
Correct |
2 ms |
688 KB |
Output is correct |
| 8 |
Correct |
2 ms |
688 KB |
Output is correct |
| 9 |
Correct |
2 ms |
688 KB |
Output is correct |
| 10 |
Correct |
2 ms |
688 KB |
Output is correct |
| 11 |
Correct |
2 ms |
688 KB |
Output is correct |
| 12 |
Correct |
2 ms |
688 KB |
Output is correct |
| 13 |
Correct |
2 ms |
688 KB |
Output is correct |
| 14 |
Correct |
2 ms |
688 KB |
Output is correct |
| 15 |
Correct |
2 ms |
688 KB |
Output is correct |
| 16 |
Correct |
2 ms |
688 KB |
Output is correct |
| 17 |
Correct |
2 ms |
688 KB |
Output is correct |
| 18 |
Correct |
2 ms |
688 KB |
Output is correct |
| 19 |
Correct |
2 ms |
688 KB |
Output is correct |
| 20 |
Correct |
2 ms |
732 KB |
Output is correct |
| 21 |
Correct |
2 ms |
732 KB |
Output is correct |
| 22 |
Correct |
2 ms |
732 KB |
Output is correct |
| 23 |
Correct |
2 ms |
732 KB |
Output is correct |
| 24 |
Correct |
2 ms |
732 KB |
Output is correct |
| 25 |
Correct |
2 ms |
732 KB |
Output is correct |
| 26 |
Correct |
2 ms |
732 KB |
Output is correct |
| 27 |
Correct |
3 ms |
732 KB |
Output is correct |
| 28 |
Correct |
2 ms |
732 KB |
Output is correct |
| 29 |
Correct |
2 ms |
732 KB |
Output is correct |
| 30 |
Correct |
2 ms |
732 KB |
Output is correct |
| 31 |
Correct |
2 ms |
732 KB |
Output is correct |
| 32 |
Correct |
2 ms |
736 KB |
Output is correct |
| 33 |
Correct |
2 ms |
736 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 |
2 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 |
3 ms |
748 KB |
Output is correct |
| 44 |
Correct |
2 ms |
748 KB |
Output is correct |
| 45 |
Correct |
2 ms |
748 KB |
Output is correct |
