```c++
#include<bits/stdc++.h>
using namespace std;
int month[15]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int x,y,sum;
int main(){
cin>>x>>y;
for(int i=1;i<=12;i++){
for(int j=1;j<=month[i];j++){
int k=j%10*1000+(j/10)*100+(i%10)*10+(i/10);
k=k*10000+i*100+j;
if(k>=x&&k<=y){
sum++;
}
}
}
cout<<sum;
return 0;
}
by danzai10 @ 2023-10-05 21:13:04