func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int i, j, n, x = (int)(1e7 + 1);     cin >> n;     vector<bool> p(x, true);     p[0] = p[1] = false;     int c = 0;     for (i = 2; i <= x; i++) {       if (p[i]) {         c++;         cout << i <<    ;         if (c == n) break;         for (j = i; (long long)i * j <= x; j++) {           p[i * j] = false;         }       }     }     cout << endl;     return 0;   }   