func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   T sqr(T x) {     return x * x;   }   template <typename T>   T abs(T x) {     return x < 0 ? -x : x;   }   template <typename T>   T gcd(T a, T b) {     return b ? gcd(b, a % b) : a;   }   template <typename T>   bool chmin(T& x, const T& y) {     if (x > y) {       x = y;       return true;     }     return false;   }   template <typename T>   bool chmax(T& x, const T& y) {     if (x < y) {       x = y;       return true;     }     return false;   }   string to_bin(int x) {     string ret;     while (x) {       ret = ret + (char)((x % 2) +  0 );       x /= 2;     }     return ret;   }   int main(int, char**) {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     while (t--) {       long long n;       cin >> n;       long long m = (n - 1) / 3;       int k = 0;       long long p = 1;       while (m >= p) {         m -= p;         k += 1;         p *= 4;       }       vector<long long> a;       for (int i = 0; i < k; ++i) {         a.push_back(m % 4);         m /= 4;       }       long long A, B;       A = 1LL << (2 * k);       B = 1LL << (2 * k + 1);       vector<long long> b = {0, 2, 3, 1};       for (int i = 0; i < k; ++i) {         A ^= a[i] << (2 * i);         B ^= b[a[i]] << (2 * i);       }       long long C = A ^ B;       long long ans;       if (n % 3 == 1) {         ans = A;       } else if (n % 3 == 2) {         ans = B;       } else {         ans = C;       }       cout << ans <<   n ;     }     cerr <<  Time execute:   << clock() / (double)CLOCKS_PER_SEC <<   sec           << endl;     return 0;   }   