摘要：
``` include using namespace std; typedef long long ll; ll a,b; int k[20]; ll dp[20][10]; ll sum[20]; ll ddfs(int pos,int lead,bool limit){ if(pos == 1 阅读全文
摘要：
```c++ include using namespace std; typedef long long ll; ll a,b; int k[20]; ll dp[20][10][2]; ll dfs(int pos,int x,bool lead,bool limit){ if(pos == 1 阅读全文