#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, arr[20];
ll dp[20][2][2][11][11];
vector<ll> v;
ll DP(int pos, int s, int t, int f1, int f2) {
if(pos >= n) return 1;
if(dp[pos][s][t][f1][f2] != -1) return dp[pos][s][t][f1][f2];
int bound = (t ? arr[pos] : 9);
ll ret = 0;
for(int i = 0; i <= bound; i++) {
if(i == f1 || i == f2) continue;
ret += DP(pos+1, (i==0 ? s : 1), (i<arr[pos] ? 0 : t), (i==0 && !s)?10:i , f1);
// next started? tight? prev value the one before
}
return dp[pos][s][t][f1][f2] = ret;
}
void apply(ll x) {
n = log10(x) + 1;
for(int i = n-1; i >= 0; i--) {
arr[i] = x % 10;
x /= 10;
}
}
int main() {
ll a, b;
scanf("%lld %lld", &a, &b);
if(b == 0) { puts("1"); return 0; }
apply(b);
memset(dp,-1,sizeof dp);
ll ansr = DP(0,0,1,10,10);
if(a == 1) { printf("%lld\n", ansr - 1); return 0; }
if(a == 0) { printf("%lld\n", ansr); return 0; }
apply(a-1);
memset(dp,-1,sizeof dp);
ll ansl = DP(0,0,1,10,10);
printf("%lld\n", ansr - ansl);
return 0;
}
Compilation message
numbers.cpp: In function 'int main()':
numbers.cpp:32:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &a, &b);
~~~~~^~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 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 |
504 KB |
Output is correct |
| 8 |
Correct |
2 ms |
676 KB |
Output is correct |
| 9 |
Correct |
2 ms |
676 KB |
Output is correct |
| 10 |
Correct |
2 ms |
752 KB |
Output is correct |
| 11 |
Correct |
2 ms |
752 KB |
Output is correct |
| 12 |
Correct |
2 ms |
752 KB |
Output is correct |
| 13 |
Correct |
2 ms |
752 KB |
Output is correct |
| 14 |
Correct |
2 ms |
752 KB |
Output is correct |
| 15 |
Correct |
2 ms |
752 KB |
Output is correct |
| 16 |
Correct |
2 ms |
752 KB |
Output is correct |
| 17 |
Correct |
2 ms |
752 KB |
Output is correct |
| 18 |
Correct |
2 ms |
752 KB |
Output is correct |
| 19 |
Correct |
2 ms |
752 KB |
Output is correct |
| 20 |
Correct |
2 ms |
752 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
752 KB |
Output is correct |
| 2 |
Correct |
2 ms |
752 KB |
Output is correct |
| 3 |
Correct |
2 ms |
752 KB |
Output is correct |
| 4 |
Correct |
2 ms |
752 KB |
Output is correct |
| 5 |
Correct |
2 ms |
752 KB |
Output is correct |
| 6 |
Correct |
2 ms |
752 KB |
Output is correct |
| 7 |
Correct |
2 ms |
752 KB |
Output is correct |
| 8 |
Correct |
2 ms |
752 KB |
Output is correct |
| 9 |
Correct |
3 ms |
752 KB |
Output is correct |
| 10 |
Correct |
3 ms |
752 KB |
Output is correct |
| 11 |
Correct |
2 ms |
756 KB |
Output is correct |
| 12 |
Correct |
2 ms |
760 KB |
Output is correct |
| 13 |
Correct |
2 ms |
768 KB |
Output is correct |
| 14 |
Correct |
2 ms |
768 KB |
Output is correct |
| 15 |
Correct |
2 ms |
772 KB |
Output is correct |
| 16 |
Correct |
3 ms |
776 KB |
Output is correct |
| 17 |
Correct |
2 ms |
780 KB |
Output is correct |
| 18 |
Correct |
3 ms |
784 KB |
Output is correct |
| 19 |
Correct |
2 ms |
788 KB |
Output is correct |
| 20 |
Correct |
2 ms |
792 KB |
Output is correct |
| 21 |
Correct |
2 ms |
852 KB |
Output is correct |
| 22 |
Correct |
3 ms |
912 KB |
Output is correct |
| 23 |
Correct |
2 ms |
912 KB |
Output is correct |
| 24 |
Correct |
2 ms |
912 KB |
Output is correct |
| 25 |
Correct |
2 ms |
912 KB |
Output is correct |
| 26 |
Correct |
2 ms |
912 KB |
Output is correct |
| 27 |
Correct |
2 ms |
912 KB |
Output is correct |
| 28 |
Correct |
2 ms |
912 KB |
Output is correct |
| 29 |
Correct |
2 ms |
912 KB |
Output is correct |
| 30 |
Correct |
2 ms |
912 KB |
Output is correct |
| 31 |
Correct |
2 ms |
912 KB |
Output is correct |
| 32 |
Correct |
2 ms |
912 KB |
Output is correct |
| 33 |
Correct |
2 ms |
912 KB |
Output is correct |
| 34 |
Correct |
2 ms |
912 KB |
Output is correct |
| 35 |
Correct |
2 ms |
912 KB |
Output is correct |
| 36 |
Correct |
2 ms |
912 KB |
Output is correct |
| 37 |
Correct |
2 ms |
912 KB |
Output is correct |
| 38 |
Correct |
2 ms |
912 KB |
Output is correct |
| 39 |
Correct |
2 ms |
912 KB |
Output is correct |
| 40 |
Correct |
3 ms |
912 KB |
Output is correct |
| 41 |
Correct |
2 ms |
912 KB |
Output is correct |
| 42 |
Correct |
2 ms |
912 KB |
Output is correct |
| 43 |
Correct |
2 ms |
944 KB |
Output is correct |
| 44 |
Correct |
2 ms |
944 KB |
Output is correct |
| 45 |
Correct |
2 ms |
944 KB |
Output is correct |
