func_code_string: #include <bits/stdc++.h>   using namespace std;   long long fact[100005];   long long power(long long x, long long y, long long p) {     long long res = 1;     x = x % p;     while (y > 0) {       if (y & 1) res = ((res % p) * (x % p)) % p;       y = y >> 1;       x = ((x % p) * (x % p)) % p;     }     return res;   }   long long modInverse(long long n, long long p) { return power(n, p - 2, p); }   long long nCrModFermat(long long n, long long r, long long p) {     if (r == 0 || r == n) return 1;     return (((fact[n] % p) * (modInverse(fact[r], p) % p)) % p *             (modInverse(fact[n - r], p) % p)) %            p;   }   void sieve(vector<bool> &isPrime) {     long long n = isPrime.size();     isPrime[0] = false;     isPrime[1] = false;     for (long long i = 2; i * i <= n; i++) {       if (isPrime[i] == true) {         for (long long j = i * i; j <= n; j += i) isPrime[j] = false;       }     }   }   void addEdge(vector<long long> adj[], long long u, long long v) {     adj[u].push_back(v);     adj[v].push_back(u);   }   void BFS(long long s, vector<long long> adj[], vector<bool> &visited) {     deque<long long> q;     q.push_back(s);     visited[s] = true;     cout << s <<    ;     while (!q.empty()) {       long long p = q.front();       q.pop_front();       for (long long i = 0; i < adj[p].size(); i++) {         if (visited[adj[p][i]] == false) {           q.push_back(adj[p][i]);           visited[adj[p][i]] = true;           cout << adj[p][i] <<    ;         }       }     }   }   void DFSUtil(long long u, vector<long long> adj[], vector<bool> &visited) {     visited[u] = true;     cout << u <<    ;     for (long long i = 0; i < adj[u].size(); i++)       if (visited[adj[u][i]] == false) DFSUtil(adj[u][i], adj, visited);   }   void DFS(vector<long long> adj[], long long V) {     vector<bool> visited(V, false);     for (long long u = 0; u < V; u++)       if (visited[u] == false) DFSUtil(u, adj, visited);   }   void ChubbyCoder() {     long long n;     cin >> n;     cout << n <<   n ;   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     long long t;     t = 1;     cin >> t;     while (t--) {       ChubbyCoder();     }   }   