#include<bits/stdc++.h>
using namespace std;
long long t,l,r,dp[20][20][20][2];
string s;
long long solve(string s){
if(s == "-1") return 0;
int n = s.length();
s = " " + s;
memset(dp, 0, sizeof dp);
dp[0][0][0][1] = 1;
for(int i=1;i<=n;i++){
int hah = (i == 1 ? 2 : 1);
for(int cs = hah; cs <= 10; cs++){
if(cs == s[i] - 47){
for(int las = 0; las <= 10; las++){
for(int pre = 0; pre <= 10; pre++){
if(pre != cs && las != cs){
dp[i][las][cs][1] += dp[i-1][pre][las][1];
}
}
}
}
if(cs < s[i] - 47){
for(int las = 0; las <= 10; las++){
for(int pre = 0; pre <= 10; pre++){
if(pre != cs && las != cs){
dp[i][las][cs][0] += dp[i-1][pre][las][1];
}
}
}
}
for(int las = 0; las <= 10; las++){
for(int pre = 0; pre <= 10; pre++){
if(pre != cs && las != cs){
dp[i][las][cs][0] += dp[i-1][pre][las][0];
}
}
}
if(i > 1 && cs > 1){
dp[i][0][cs][0]++;
}
}
}
long long ans = 1;
for(int cs = 0; cs <= 10; cs++){
for(int las = 0; las <= 10; las++){
ans += dp[n][las][cs][1] + dp[n][las][cs][0];
}
}
return ans;
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> l >> r;
l--; s = to_string(l);
long long ans1 = solve(s);
s = to_string(r);
long long ans2 = solve(s);
cout << ans2 - ans1;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
504 KB |
Output is correct |
| 3 |
Correct |
2 ms |
504 KB |
Output is correct |
| 4 |
Correct |
2 ms |
504 KB |
Output is correct |
| 5 |
Correct |
2 ms |
504 KB |
Output is correct |
| 6 |
Correct |
2 ms |
504 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
504 KB |
Output is correct |
| 9 |
Correct |
2 ms |
504 KB |
Output is correct |
| 10 |
Correct |
2 ms |
504 KB |
Output is correct |
| 11 |
Correct |
2 ms |
412 KB |
Output is correct |
| 12 |
Correct |
2 ms |
504 KB |
Output is correct |
| 13 |
Correct |
2 ms |
504 KB |
Output is correct |
| 14 |
Correct |
2 ms |
504 KB |
Output is correct |
| 15 |
Correct |
2 ms |
544 KB |
Output is correct |
| 16 |
Correct |
2 ms |
504 KB |
Output is correct |
| 17 |
Correct |
2 ms |
404 KB |
Output is correct |
| 18 |
Correct |
2 ms |
504 KB |
Output is correct |
| 19 |
Correct |
2 ms |
504 KB |
Output is correct |
| 20 |
Correct |
2 ms |
504 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
424 KB |
Output is correct |
| 3 |
Correct |
2 ms |
504 KB |
Output is correct |
| 4 |
Correct |
2 ms |
416 KB |
Output is correct |
| 5 |
Correct |
2 ms |
504 KB |
Output is correct |
| 6 |
Correct |
2 ms |
504 KB |
Output is correct |
| 7 |
Correct |
2 ms |
504 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
504 KB |
Output is correct |
| 10 |
Correct |
2 ms |
504 KB |
Output is correct |
| 11 |
Correct |
2 ms |
504 KB |
Output is correct |
| 12 |
Correct |
2 ms |
504 KB |
Output is correct |
| 13 |
Correct |
2 ms |
504 KB |
Output is correct |
| 14 |
Correct |
2 ms |
504 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
412 KB |
Output is correct |
| 17 |
Correct |
2 ms |
504 KB |
Output is correct |
| 18 |
Correct |
2 ms |
508 KB |
Output is correct |
| 19 |
Correct |
2 ms |
504 KB |
Output is correct |
| 20 |
Correct |
2 ms |
504 KB |
Output is correct |
| 21 |
Correct |
2 ms |
504 KB |
Output is correct |
| 22 |
Correct |
2 ms |
504 KB |
Output is correct |
| 23 |
Correct |
2 ms |
504 KB |
Output is correct |
| 24 |
Correct |
2 ms |
504 KB |
Output is correct |
| 25 |
Correct |
2 ms |
508 KB |
Output is correct |
| 26 |
Correct |
2 ms |
504 KB |
Output is correct |
| 27 |
Correct |
2 ms |
504 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
504 KB |
Output is correct |
| 30 |
Correct |
2 ms |
504 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
14 ms |
504 KB |
Output is correct |
| 33 |
Correct |
2 ms |
504 KB |
Output is correct |
| 34 |
Correct |
2 ms |
504 KB |
Output is correct |
| 35 |
Correct |
2 ms |
376 KB |
Output is correct |
| 36 |
Correct |
2 ms |
504 KB |
Output is correct |
| 37 |
Correct |
2 ms |
504 KB |
Output is correct |
| 38 |
Correct |
2 ms |
504 KB |
Output is correct |
| 39 |
Correct |
2 ms |
380 KB |
Output is correct |
| 40 |
Correct |
2 ms |
504 KB |
Output is correct |
| 41 |
Correct |
2 ms |
376 KB |
Output is correct |
| 42 |
Correct |
2 ms |
376 KB |
Output is correct |
| 43 |
Correct |
2 ms |
504 KB |
Output is correct |
| 44 |
Correct |
2 ms |
504 KB |
Output is correct |
| 45 |
Correct |
2 ms |
504 KB |
Output is correct |
