func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100001];   int main() {     int n, x = 0;     cin >> n;     for (int i = 2; i <= n; i++) {       if (a[i] == 0) {         x++;         a[i] = x;         for (int j = i; j <= n; j += i) a[j] = x;       }     }     for (int i = 2; i <= n; i++) cout << a[i] <<    ;   }   