func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     set<long long> s;     for (long long a = 1; a <= 2 * 1e9; a *= 2) {       for (long long b = 1; b <= 2 * 1e9; b *= 3) {         s.insert(a * b);       }     }     int l, r, ans = 0;     cin >> l >> r;     for (set<long long>::iterator it = s.begin(); it != s.end(); ++it)       ans += *it <= r && *it >= l;     cout << ans;     return 0;   }   