func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 2e5 + 5, INF = 0x3f3f3f3f;   int a[maxn];   int last[maxn];   int main() {     int n;     while (cin >> n) {       memset(last, INF, sizeof(last));       for (int i = 0; i < n; i++) {         cin >> a[i];         last[a[i]] = i;       }       sort(last, last + maxn);       cout << a[last[0]] << endl;     }     return 0;   }   