func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     ;     long long int n, k;     cin >> n >> k;     int a[n + 1];     for (int i = (1); i <= (n); i++) cin >> a[i];     long long int d = 1 + 8 * k;     long long int x = (long long int)floor(((sqrt(d) - 1) / 2));     if (n == 1)       cout << a[1] << endl;     else {       if ((x * (x + 1)) / 2 == k)         cout << a[x] << endl;       else         cout << a[k - (x * (x + 1)) / 2] << endl;     }     return 0;   }   