/** MIT License Copyright (c) 2018 Vasilyev Daniil **/
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast")
template<typename T> using v = vector<T>;
#define int long long
typedef string str;
typedef vector<int> vint;
#define rep(a, l, r) for(int a = (l); a < (r); a++)
#define pb push_back
#define sz(a) ((int) a.size())
const long long inf = 4611686018427387903; //2^62 - 1
#if 0 //FileIO
const string fileName = "";
ifstream fin ((fileName == "" ? "input.txt" : fileName + ".in" ));
ofstream fout((fileName == "" ? "output.txt" : fileName + ".out"));
#define get fin>>
#define put fout<<
#else
#define get cin>>
#define put cout<<
#endif
#define eol put endl
void read() {} template<typename Arg,typename... Args> void read (Arg& arg,Args&... args){get (arg) ;read(args...) ;}
void print(){} template<typename Arg,typename... Args> void print(Arg arg,Args... args){put (arg)<<" ";print(args...);}
void debug(){eol;} template<typename Arg,typename... Args> void debug(Arg arg,Args... args){put (arg)<<" ";debug(args...);}
int getInt(){int a; get a; return a;}
//code goes here
int solve(int r) {
if (r <= 9)
return r + 1;
int ans = 0;
int dd = 1;
while (dd * 10 <= r)
dd *= 10;
ans += solve(dd - 1);
vint digits;
while (r) {
digits.pb(r % 10);
r /= 10;
}
reverse(digits.begin(), digits.end());
int n = sz(digits);
int dp[n][10][11]; //dp[i][j][k] - i-th digit; j-th cur digit; k-th cur previous digit.
rep(i, 0, n) {
int prob1 = (i ? digits[i - 1] : 10),
prob2 = (i > 1 ? digits[i - 2] : 10);
bool cantGoFurther = 0;
if (digits[i] == prob1 || digits[i] == prob2)
cantGoFurther = 1;
rep(j, 0, 10) {
rep(k, 0, 11)
dp[i][j][k] = 0;
if (digits[i] < j || (i + 1 < n && digits[i] == j) || (i == 0 && j == 0))
continue;
if (j != prob1 && j != prob2)
dp[i][j][prob1] = 1;
}
rep(p, i + 1, n)
rep(j, 0, 10)
rep(k, 0, 11) {
dp[p][j][k] = 0;
if (k == 10)
break;
if (j != k)
rep(l, 0, 11)
if (l != j && l != k)
dp[p][j][k] += dp[p - 1][k][l];
}
rep(j, 0, 10)
rep(k, 0, 10)
ans += dp[n - 1][j][k];
if (cantGoFurther)
break;
}
return ans;
}
void run() {
int a, b;
read(a, b);
put solve(b) - solve(a - 1);
}
int32_t main() {srand(time(0)); ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); put fixed; put setprecision(15); run(); return 0;}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
496 KB |
Output is correct |
| 3 |
Correct |
3 ms |
496 KB |
Output is correct |
| 4 |
Correct |
2 ms |
496 KB |
Output is correct |
| 5 |
Correct |
2 ms |
496 KB |
Output is correct |
| 6 |
Correct |
2 ms |
496 KB |
Output is correct |
| 7 |
Correct |
2 ms |
524 KB |
Output is correct |
| 8 |
Correct |
3 ms |
576 KB |
Output is correct |
| 9 |
Correct |
2 ms |
704 KB |
Output is correct |
| 10 |
Correct |
2 ms |
704 KB |
Output is correct |
| 11 |
Correct |
3 ms |
704 KB |
Output is correct |
| 12 |
Correct |
3 ms |
704 KB |
Output is correct |
| 13 |
Correct |
3 ms |
768 KB |
Output is correct |
| 14 |
Correct |
3 ms |
768 KB |
Output is correct |
| 15 |
Correct |
2 ms |
768 KB |
Output is correct |
| 16 |
Correct |
2 ms |
768 KB |
Output is correct |
| 17 |
Correct |
2 ms |
768 KB |
Output is correct |
| 18 |
Correct |
2 ms |
768 KB |
Output is correct |
| 19 |
Correct |
3 ms |
768 KB |
Output is correct |
| 20 |
Correct |
2 ms |
768 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
768 KB |
Output is correct |
| 2 |
Correct |
2 ms |
768 KB |
Output is correct |
| 3 |
Correct |
4 ms |
768 KB |
Output is correct |
| 4 |
Correct |
3 ms |
768 KB |
Output is correct |
| 5 |
Correct |
3 ms |
768 KB |
Output is correct |
| 6 |
Correct |
3 ms |
768 KB |
Output is correct |
| 7 |
Correct |
3 ms |
768 KB |
Output is correct |
| 8 |
Correct |
5 ms |
768 KB |
Output is correct |
| 9 |
Correct |
3 ms |
824 KB |
Output is correct |
| 10 |
Correct |
2 ms |
824 KB |
Output is correct |
| 11 |
Correct |
4 ms |
824 KB |
Output is correct |
| 12 |
Correct |
3 ms |
824 KB |
Output is correct |
| 13 |
Correct |
3 ms |
824 KB |
Output is correct |
| 14 |
Correct |
2 ms |
824 KB |
Output is correct |
| 15 |
Correct |
2 ms |
824 KB |
Output is correct |
| 16 |
Correct |
3 ms |
824 KB |
Output is correct |
| 17 |
Correct |
3 ms |
824 KB |
Output is correct |
| 18 |
Correct |
4 ms |
824 KB |
Output is correct |
| 19 |
Correct |
3 ms |
824 KB |
Output is correct |
| 20 |
Correct |
2 ms |
824 KB |
Output is correct |
| 21 |
Correct |
2 ms |
824 KB |
Output is correct |
| 22 |
Correct |
3 ms |
824 KB |
Output is correct |
| 23 |
Correct |
3 ms |
824 KB |
Output is correct |
| 24 |
Correct |
3 ms |
824 KB |
Output is correct |
| 25 |
Correct |
2 ms |
824 KB |
Output is correct |
| 26 |
Correct |
3 ms |
824 KB |
Output is correct |
| 27 |
Correct |
3 ms |
824 KB |
Output is correct |
| 28 |
Correct |
3 ms |
824 KB |
Output is correct |
| 29 |
Correct |
3 ms |
824 KB |
Output is correct |
| 30 |
Correct |
2 ms |
832 KB |
Output is correct |
| 31 |
Correct |
3 ms |
836 KB |
Output is correct |
| 32 |
Correct |
2 ms |
840 KB |
Output is correct |
| 33 |
Correct |
3 ms |
844 KB |
Output is correct |
| 34 |
Correct |
3 ms |
848 KB |
Output is correct |
| 35 |
Correct |
3 ms |
852 KB |
Output is correct |
| 36 |
Correct |
2 ms |
960 KB |
Output is correct |
| 37 |
Correct |
2 ms |
960 KB |
Output is correct |
| 38 |
Correct |
3 ms |
960 KB |
Output is correct |
| 39 |
Correct |
2 ms |
960 KB |
Output is correct |
| 40 |
Correct |
3 ms |
960 KB |
Output is correct |
| 41 |
Correct |
4 ms |
960 KB |
Output is correct |
| 42 |
Correct |
2 ms |
960 KB |
Output is correct |
| 43 |
Correct |
3 ms |
960 KB |
Output is correct |
| 44 |
Correct |
4 ms |
960 KB |
Output is correct |
| 45 |
Correct |
3 ms |
960 KB |
Output is correct |
