func_code_string: #include <bits/stdc++.h>   const int MOD = 1e9 + 7;   const int MAXN = 2e5 + 17;   const int magic = (1 << 7);   using namespace std;   struct p {     long double x, y;     p(long double x, long double y) : x(x), y(y) {}     p() {}     long double len() const { return sqrt(x * x + y * y); }   };   p operator-(const p &a, const p &b) { return p(a.x - b.x, a.y - b.y); }   string s;   bool solve(int l, int r) {     int q = 0;     map<char, int> c;     int num = 0;     for (int i = l; i <= r; i++) {       if (s[i] ==  ? )         q++;       else         c[s[i]]++;     }     if (c.size() + q >= 26) {       for (int i = l; i <= r; i++) {         if (s[i] ==  ? )           for (int x = int( A ); x <= int( Z ); x++) {             if (c[char(x)] == 0) {               s[i] = char(x), c[char(x)]++;               break;             }           }       }       return true;     }     return false;   }   int main() {     if (1) {       ios_base::sync_with_stdio(false);       cin.tie(nullptr);       cout.tie(nullptr);     }     long long n;     cin >> n;     long long cur = 2;     for (long long i = 1; i <= n; i++) {       cout << (i * (i + 1) * (i + 1) - cur / i) <<   n ;       cur = i * (i + 1);     }     return 0;   }   