func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxN = 1000 + 10;   int n, flag, a[maxN], i, j, m;   int main() {     cin >> n;     for (i = 2; i <= n; i++) {       for (j = 2; j * j <= i; j++) {         if (i != j && i % j == 0) flag = 1;       }       j = i;       while (flag == 0 && j <= n) {         a[m++] = j;         j *= i;       }       flag = 0;     }     cout << m << endl;     for (int k = 0; k < m; k++) cout << a[k] <<    ;     return 0;   }   