func_code_string: #include <bits/stdc++.h>   using namespace std;   int ans;   void solve(long long n, long long l1, long long r1, long long l, long long r) {     if (n == 0 || l1 > r || r1 < l) return;     long long mid = (l1 + r1) >> 1;     if (mid >= l && mid <= r) ans += (n % 2);     solve(n / 2, l1, mid - 1, l, r);     solve(n / 2, mid + 1, r1, l, r);   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long n, l, r;     cin >> n, cin >> l, cin >> r;     long long tmp = n, var = 0;     while (tmp > 0) {       tmp /= 2;       var++;     }     long long num = (1LL << var) - 1;     solve(n, 1, num, l, r);     cout << ans << endl;     return 0;   }   