func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 2e5 + 1;   const int MOD = 1e9 + 7;   class Problem {    public:     int N, Q, t, k, d;     char ch;     string S;     void solve(std::istream& input, std::ostream& output);   };   void Problem::solve(std::istream& input, std::ostream& output) {     input >> N;     for (int i = sqrt(N); i >= 1; i--) {       if (N % i == 0) {         output << i <<     << N / i;         exit(0);       }     }   }   int main() {     ios_base::sync_with_stdio(false);     std::istream& input(std::cin);     std::ostream& output(std::cout);     input.tie(0);     Problem _A;     _A.solve(input, output);     return 0;   }   