func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, k, p[1000001];   long long ans;   int main() {     scanf( %d%d , &n, &k);     if (k == 1) {       printf( 3 );       return 0;     }     for (int i = 1; i <= n; i++) p[i] = i;     for (int i = 2; i <= n; i++)       if (p[i] == i)         for (int j = i; j <= n; j += i) p[j] -= p[j] / i;     sort(p + 1, p + 1 + n);     for (int i = 1; i <= k + 2; i++) ans += p[i];     printf( %I64d , ans);     return 0;   }   