#include<bits/stdc++.h>
using namespace std;
#define int long long
#define st first
#define nd second
#define ppii pair<pair<int,int>,pair<int, int>>
const int maxn = 2e5 + 5;
string t;
int a, b, dp[20][2][11][11][2];
int caldp(int pos, int eq, int lst1, int lst2, int start){
if(pos == t.size())
return 1;
if(dp[pos][eq][lst1][lst2][start] != -1)
return dp[pos][eq][lst1][lst2][start];
int ans = 0;
if(eq){
int limit = t[pos] - '0';
if(start){
for(int i = 0 ; i <= limit ; i++){
if(i == lst1 || i == lst2)
continue;
ans += caldp(pos + 1, (i == limit), i, lst1, start);
}
}
else{
for(int i = 1 ; i <= limit ; i++){
ans += caldp(pos + 1, (i == limit), i, -1, 1);
}
}
}
else{
if(start){
for(int i = 0 ; i <= 9 ; i++){
if(i == lst1 || i == lst2)
continue;
ans += caldp(pos + 1, 0, i, lst1, start);
}
}
else{
for(int i = 1 ; i <= 9 ; i++){
ans += caldp(pos + 1, 0, i, -1, 1);
}
}
}
return dp[pos][eq][lst1][lst2][start] = ans;
}
int prepdp(int x){
memset(dp, -1, sizeof dp);
t = to_string(x);
return caldp(0, 1, -1, -1, 0);
}
void solve(){
int a, b;
cin >> a >> b;
cout << prepdp(b) - prepdp(a - 1);
}
signed main(){
cin.tie(0)->sync_with_stdio(0);
int tc = 1;
// cin >> tc;
while(tc--){
solve();
}
}
Compilation message
numbers.cpp: In function 'long long int caldp(long long int, long long int, long long int, long long int, long long int)':
numbers.cpp:11:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | if(pos == t.size())
| ~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
324 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 5 |
Incorrect |
1 ms |
340 KB |
Output isn't 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 |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
316 KB |
Output is correct |
| 18 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 19 |
Correct |
1 ms |
320 KB |
Output is correct |
| 20 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| # |
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 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 9 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 10 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 14 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
324 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 |
324 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 |
320 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 |
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 |
324 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 |
1 ms |
340 KB |
Output is correct |
