#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 2e5 + 9;
const ll inf = 1e16 + 7;
typedef pair<int,int> LL;
string s;
ll n,k,dp[20][12][12][2][2],L,R;
string To_string(ll x){
string res;
while(x > 0) res += char(x%10 + '0'),x /= 10;
reverse(res.begin(),res.end());
return res;
}
ll f(ll num,ll prv1,ll prv2,ll smaller,ll st){
if (num > n) return 1;
if (dp[num][prv1][prv2][smaller][st] != -1) return dp[num][prv1][prv2][smaller][st];
ll ans = 0,now = s[num] - '0';
for (ll i = 0;i <= 9;i++){
if (!smaller && i > now) break;
if (!st){
if (!i) ans += f(num + 1,prv1,prv2,1,0);
else{
if (i < now || smaller) ans += f(num + 1,i,prv1,1,1);
else if (i == now) ans += f(num + 1,i,prv1,0,1);
}
}
else{
if (i != prv1 && i != prv2){
if (i < now || smaller) ans += f(num + 1,i,prv1,1,1);
else if (i == now) ans += f(num + 1,i,prv1,0,1);
}
}
}
return dp[num][prv1][prv2][smaller][st] = ans;
}
ll cal(ll x){
memset(dp,-1,sizeof(dp));
if (!x) return 1;
s = To_string(x); s = " " + s; n = s.size() - 1;
//cout<<f(1,10,10,0,0); exit(0);
return f(1,10,10,0,0);
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
#define task "tst"
if (fopen(task".INP","r")){
freopen(task".INP","r",stdin);
//freopen(task".OUT","w",stdout);
}
cin>>L>>R;
//cout<<cal(9); return 0;
cout<<cal(R) - cal(L - 1);
}
Compilation message
numbers.cpp: In function 'int main()':
numbers.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
56 | freopen(task".INP","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
640 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
512 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 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
640 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Incorrect |
1 ms |
364 KB |
Output isn't 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 |
632 KB |
Output is correct |
| 7 |
Correct |
1 ms |
640 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 |
512 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 |
Correct |
2 ms |
364 KB |
Output is 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 |
492 KB |
Output is correct |
| 33 |
Correct |
1 ms |
640 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 |
2 ms |
632 KB |
Output is correct |
| 38 |
Correct |
1 ms |
364 KB |
Output is correct |
| 39 |
Correct |
1 ms |
640 KB |
Output is correct |
| 40 |
Correct |
1 ms |
364 KB |
Output is correct |
| 41 |
Correct |
2 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 |
Correct |
1 ms |
364 KB |
Output is correct |
| 45 |
Correct |
1 ms |
364 KB |
Output is correct |
