题解

#include <bits/stdc++.h>
#include <codecvt>
using namespace std;
int main(){
int a,b,c=0;
cin>>a>>b;
for(int i=a;i<=b;i++){
int g=i,o=0;
while(g!=1){if(g%20||g%50){

        if(g%2==0){g/=2;}
        if(g%5==0){g/=5;}
      
    }else{o++;break;}}if(o==0){c++;}o=0;
}
cout<<c;

return 0;
}