题意：中文题

思路：数位dp入门题

AC代码：

#include "iostream"#include "string.h"#include "stack"#include "queue"#include "string"#include "vector"#include "set"#include "map"#include "algorithm"#include "stdio.h"#include "math.h"#pragma comment(linker, "/STACK:102400000,102400000")#define ll long long#define endl ("\n")#define bug(x) cout<
     
      <<" "<<"UUUUU"<
      
       0){        bit[++t]=x%10;        x/=10;    }    return dfs(t, -1, 0, 1);}int main(){    ll l,r; mem(dp,-1);    while(cin>>l>>r && l&&r){        cout<
       
        <