func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[200000 + 1];   int n;   int b[200000 + 1];   int main() {     cin >> n;     for (int i = 1; i <= n; i++) {       cin >> a[i];       b[a[i]] = 0;     }     int max = -1;     int k = 0;     int numb;     for (int i = n; i > 0; i--) {       k = 0;       if (b[a[i]] == 0) {         b[a[i]] = 1;         k = n - i;       }       if (k > max) {         max = k;         numb = a[i];       }     }     cout << numb;     return 0;   }   