func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 1e9;   const int N = 100010;   int n, k, m;   int a[N];   int main() {     ios_base::sync_with_stdio(0);     cout.tie(0);     cin.tie(0);     cin >> n >> k;     for (int i = 1; i <= n; i++) cin >> a[i];     int cnt = 0;     while (k > 0) {       cnt += 1;       k -= cnt;     }     cout << a[k + cnt];     return 0;   }   