func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     vector<int> v;     int n, i, j, k, len, x, y, c, a[1020] = {0};     cin >> n;     if (n == 1) {       cout <<  0  << endl;       return 0;     }     a[1] = 1;     for (i = 2; i <= 1000; i++) {       c = 2;       for (j = i * c; j <= 1000; j = i * c) {         a[j] = 1;         c++;       }     }     for (i = 2; i <= n; i++) {       if (a[i] == 0) {         for (j = i; j <= n; j = j * i) {           v.push_back(j);         }       }     }     cout << v.size() << endl;     for (i = 0; i < v.size(); i++) {       cout << v[i] <<    ;     }   }   