//!yrt tsuj uoy srettam gnihton no emoc
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define pb push_back
#define mp make_pair
#define pii pair <int, int>
#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define F first
#define S second
ll a, b, ans = 0;
ll x, y;
string A, B;
ll pw(ll x, ll y){
// cout << x << " | " << y << endl;
ll res = 1;
for(ll i = 0; i < y; i ++){
res *= x;
}
return res;
}
bool Y(int l, int r, int m){
return (m > l && m < r);
}
void solve_s(ll st){
for(ll i = st - 1; i >= 0; i --){
ll t = 9 - (A[i] - '0') - (i < x - 1 && A[i + 1] > A[i]) - (i < x - 2 && A[i + 2] > A[i] && A[i + 2] != A[i + 1]);
ans += 1LL * t * (i == x - 1 ? 9 * pw(8, i - 1) : pw(8, i));
if(i < x - 1 && A[i] == A[i + 1]){
return;
}
if(i < x - 2 && A[i] == A[i + 2]){
return;
}
// cout << "ani = " << i << " : " << ans << endl;
}
if(0 < x - 1 && A[0] == A[1]){
return;
}
if(0 < x - 2 && A[0] == A[2]){
return;
}
ans ++;
return;
}
void solve_b(ll st){
for(ll i = st - 1; i >= 0; i --){
ll t = (B[i] - '0' - (i == y - 1)) - (i < y - 1 && B[i + 1] < B[i]) - (i < y - 2 && B[i + 2] < B[i]);
ans += 1LL * t * (i == y - 1 ? 9 * pw(8, i - 1) : pw(8, i));
if(i < y - 1 && B[i] == B[i + 1]){
return;
}
if(i < y - 2 && B[i] == B[i + 2]){
return;
}
// cout << "ani = " << i << " : " << ans << endl;
}
if(0 < y - 1 && B[0] == B[1]){
return;
}
if(0 < y - 2 && B[0] == B[2]){
return;
}
ans ++;
return;
}
bool check(ll x){
string s = to_string(x);
for(ll i = 1; i < s.size(); i ++){
if(s[i] == s[i - 1]){
return false;
}
if(i > 1 && s[i] == s[i - 2]){
return false;
}
}
return true;
}
void solve(){
ll ans = 0;
for(ll i = a; i <= b; i ++){
ans += check(i);
}
cout << ans;
}
int main(){
fast_io;
cin >> a >> b;
A = to_string(a);
B = to_string(b);
x = A.size(), y = B.size();
reverse(A.begin(), A.end());
reverse(B.begin(), B.end());
// if(b - a <= 1e5){
// solve();
// return 0;
// }
if(x == y){
// assert(0);
ll ind = x - 1;
while(ind >= 0 && A[ind] == B[ind]){
if(ind < x - 1 && A[ind] == A[ind + 1]){
cout << 0;
return 0;
}
if(ind < x - 2 && A[ind] == A[ind + 2]){
cout << 0;
return 0;
}
ind --;
}
if(ind >= 0){
ll t = 1LL * (B[ind] - A[ind]) - 1 - (ind + 1 < x && Y(A[ind], B[ind], A[ind + 1])) - (ind + 2 < x && Y(A[ind], B[ind], A[ind + 2]));
ans += t * (ind == x - 1 ? 9 * pw(8, ind - 1) : pw(8, ind));
// cout << "t , ans = " << t << " , " << ans << " | " << ind << endl;
solve_s(ind);
// cout << "ans = " << ans << endl;
solve_b(ind);
}else
ans = 1;
}else{
for(ll i = x + 1; i < y; i ++){
ans += 1LL * 9 * 9 * pw(8, i - 2);
}
// cout << "ans = " << ans << endl;
solve_s(x);
// cout << "ans = " << ans << endl;
solve_b(y);
}
// cout << ans + (x == 0);
cout << ans;
return 0;
}
Compilation message
numbers.cpp: In function 'bool check(ll)':
numbers.cpp:77:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
77 | for(ll i = 1; i < s.size(); i ++){
| ~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 5 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 6 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 7 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
2 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
1 ms |
364 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| 33 |
Correct |
1 ms |
364 KB |
Output is correct |
| 34 |
Correct |
1 ms |
364 KB |
Output is correct |
| 35 |
Correct |
1 ms |
364 KB |
Output is correct |
| 36 |
Correct |
1 ms |
364 KB |
Output is correct |
| 37 |
Correct |
1 ms |
364 KB |
Output is correct |
| 38 |
Correct |
1 ms |
364 KB |
Output is correct |
| 39 |
Correct |
1 ms |
364 KB |
Output is correct |
| 40 |
Correct |
1 ms |
364 KB |
Output is correct |
| 41 |
Correct |
1 ms |
364 KB |
Output is correct |
| 42 |
Correct |
1 ms |
364 KB |
Output is correct |
| 43 |
Correct |
1 ms |
364 KB |
Output is correct |
| 44 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 45 |
Correct |
1 ms |
364 KB |
Output is correct |
