func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1e9 + 7;   long long getres(long long n) {     if (n == 0) {       return 0;     }     vector<long long> now;     for (long long i = 0;; i++) {       long long t = pow(2, i);       if (t <= n) {         n -= t;         now.push_back(t);         if (n == 0) {           break;         }       } else {         now.push_back(n);         break;       }     }     long long even = 0, odd = 0;     for (long long i = 0; i < now.size(); i++) {       if (i % 2) {         even = (even + now[i]) % mod;       } else {         odd = (odd + now[i]) % mod;       }     }     long long odd_sum = (((odd) % mod) * (odd % mod)) % mod;     long long even_sum = (((even) % mod) * ((even + 1) % mod)) % mod;     long long res = (odd_sum + even_sum) % mod;     return res;   }   int main() {     ios_base::sync_with_stdio(false);     long long l, r;     cin >> l >> r;     long long ans = (getres(r) - getres(l - 1) + mod) % mod;     cout << ans <<   n ;   }   