func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int x, a, b = 0;     cin >> x;     for (int i = 1; i <= x; i++) {       int k = 1;       while (i * k <= x) {         if (i * i * k > x && k < x) {           a = i * k;           b = i;           break;         } else           k = k + 1;       }     }     if (b == 0)       cout << -1;     else       cout << a <<     << b;     return 0;   }   