#include <bits/stdc++.h>
#define N 25
using namespace std;
typedef long long ll;
ll a, b, A[N], B[N], sz[2];
void fill(ll x, ll t)
{
vector<ll> v;
while(x > 0)
{
ll r = x % 10;
v.push_back(r);
x /= 10;
}
reverse(v.begin(), v.end());
sz[t] = v.size();
for(int i = 0; i < v.size(); i++)
if(!t) A[i+1] = v[i];
else B[i+1] = v[i];
}
// F = 1, O NUMERO JÁ É ESTRITAMENTE MENOR
//F = 0, O NUMERO É EXATAMENTE IGUAL
ll dp[N][13][13][2];
ll solveA(int i, int a, int b, int f)
{
if(i > sz[0]) return 1;
if(dp[i][a+1][b+1][f] != -1) return dp[i][a+1][b+1][f];
ll ans = 0;
for(int k = 0; k < 10; k++)
{
if((i == 1 and !k) or k == a or k == b) continue;
if(f == 1) ans += solveA(i + 1, k, a, f);
else
{
if(k < A[i]) ans += solveA(i + 1, k, a, 1);
else if(k == A[i]) ans += solveA(i + 1, k, a, 0);
}
}
return dp[i][a+1][b+1][f] = ans;
}
int t;
ll solveA2(int i, int a, int b, int f)
{
if(i > t) return 1;
if(dp[i][a+1][b+1][f] != -1) return dp[i][a+1][b+1][f];
ll ans = 0;
for(int k = 0; k < 10; k++)
{
if((i == 1 and !k) or k == a or k == b) continue;
ans += solveA2(i + 1, k, a, f);
}
return dp[i][a+1][b+1][f] = ans;
}
int main()
{
cin>>a>>b;
a--;
fill(a, 0);
memset(dp, -1, sizeof dp);
ll L = solveA(1, -1, -1, 0);
for(int T = 1; T < sz[0]; T++)
{
t = T;
memset(dp, -1, sizeof dp);
L += solveA2(1, -1, -1, 0);
}
memset(dp, -1, sizeof dp);
fill(b, 0);
ll R = solveA(1, -1, -1, 0);
for(int T = 1; T < sz[0]; T++)
{
t = T;
memset(dp, -1, sizeof dp);
R += solveA2(1, -1, -1, 0);
}
if(a < 0) L -= 2;
if(a == 0) L--;
if(b == 0) R --;
cout<<R - L<<"\n";
}
Compilation message
numbers.cpp: In function 'void fill(ll, ll)':
numbers.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < v.size(); i++)
~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
376 KB |
Output is correct |
| 3 |
Correct |
4 ms |
560 KB |
Output is correct |
| 4 |
Correct |
2 ms |
636 KB |
Output is correct |
| 5 |
Correct |
3 ms |
696 KB |
Output is correct |
| 6 |
Correct |
2 ms |
696 KB |
Output is correct |
| 7 |
Correct |
2 ms |
696 KB |
Output is correct |
| 8 |
Correct |
3 ms |
696 KB |
Output is correct |
| 9 |
Correct |
3 ms |
696 KB |
Output is correct |
| 10 |
Correct |
3 ms |
696 KB |
Output is correct |
| 11 |
Correct |
2 ms |
696 KB |
Output is correct |
| 12 |
Correct |
3 ms |
696 KB |
Output is correct |
| 13 |
Correct |
2 ms |
696 KB |
Output is correct |
| 14 |
Correct |
3 ms |
696 KB |
Output is correct |
| 15 |
Correct |
2 ms |
696 KB |
Output is correct |
| 16 |
Correct |
3 ms |
696 KB |
Output is correct |
| 17 |
Correct |
4 ms |
696 KB |
Output is correct |
| 18 |
Correct |
2 ms |
696 KB |
Output is correct |
| 19 |
Correct |
4 ms |
696 KB |
Output is correct |
| 20 |
Correct |
2 ms |
696 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
696 KB |
Output is correct |
| 2 |
Correct |
5 ms |
696 KB |
Output is correct |
| 3 |
Correct |
5 ms |
696 KB |
Output is correct |
| 4 |
Correct |
6 ms |
696 KB |
Output is correct |
| 5 |
Correct |
2 ms |
696 KB |
Output is correct |
| 6 |
Correct |
2 ms |
696 KB |
Output is correct |
| 7 |
Correct |
2 ms |
696 KB |
Output is correct |
| 8 |
Correct |
3 ms |
696 KB |
Output is correct |
| 9 |
Correct |
3 ms |
696 KB |
Output is correct |
| 10 |
Correct |
3 ms |
696 KB |
Output is correct |
| 11 |
Correct |
3 ms |
696 KB |
Output is correct |
| 12 |
Correct |
4 ms |
696 KB |
Output is correct |
| 13 |
Correct |
3 ms |
696 KB |
Output is correct |
| 14 |
Correct |
3 ms |
696 KB |
Output is correct |
| 15 |
Correct |
2 ms |
696 KB |
Output is correct |
| 16 |
Correct |
4 ms |
696 KB |
Output is correct |
| 17 |
Correct |
4 ms |
696 KB |
Output is correct |
| 18 |
Correct |
5 ms |
696 KB |
Output is correct |
| 19 |
Correct |
5 ms |
696 KB |
Output is correct |
| 20 |
Correct |
5 ms |
696 KB |
Output is correct |
| 21 |
Correct |
4 ms |
696 KB |
Output is correct |
| 22 |
Correct |
3 ms |
696 KB |
Output is correct |
| 23 |
Correct |
4 ms |
696 KB |
Output is correct |
| 24 |
Correct |
4 ms |
696 KB |
Output is correct |
| 25 |
Correct |
4 ms |
696 KB |
Output is correct |
| 26 |
Correct |
4 ms |
696 KB |
Output is correct |
| 27 |
Correct |
6 ms |
696 KB |
Output is correct |
| 28 |
Correct |
4 ms |
696 KB |
Output is correct |
| 29 |
Correct |
4 ms |
696 KB |
Output is correct |
| 30 |
Correct |
4 ms |
696 KB |
Output is correct |
| 31 |
Correct |
5 ms |
696 KB |
Output is correct |
| 32 |
Correct |
5 ms |
696 KB |
Output is correct |
| 33 |
Correct |
4 ms |
696 KB |
Output is correct |
| 34 |
Correct |
4 ms |
696 KB |
Output is correct |
| 35 |
Correct |
4 ms |
696 KB |
Output is correct |
| 36 |
Correct |
4 ms |
696 KB |
Output is correct |
| 37 |
Correct |
3 ms |
696 KB |
Output is correct |
| 38 |
Correct |
4 ms |
696 KB |
Output is correct |
| 39 |
Correct |
4 ms |
696 KB |
Output is correct |
| 40 |
Correct |
4 ms |
696 KB |
Output is correct |
| 41 |
Correct |
5 ms |
696 KB |
Output is correct |
| 42 |
Correct |
4 ms |
696 KB |
Output is correct |
| 43 |
Correct |
4 ms |
696 KB |
Output is correct |
| 44 |
Correct |
4 ms |
696 KB |
Output is correct |
| 45 |
Correct |
4 ms |
696 KB |
Output is correct |
