// OM SHRI GANESHAY NAMAH
// HARE KRISHNA
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
using vi = vector<int>;
using vs = vector<string>;
using vb = vector<bool>;
using vvi = vector<vector<int>>;
using pii = pair<int, int>;
using vpii = vector<pair<int, int>>;
using si = set<int>;
using mii = map<int, int>;
template<typename T> using pbds = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define sz(x) (int)size(x)
#define pb emplace_back
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define fr first
#define sc second
#define fo(i, end) for (int i = 0; i < end; i++)
#define foo(i, start, end) for (int i = start; i < end; i++)
template<typename T> inline void domin(T &x, T y) {if (y < x) x = y;}
template<typename T> inline void domax(T &x, T y) {if (y > x) x = y;}
template<typename T, typename U> ostream& operator<<(ostream &os, const pair<T, U> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template < typename T_container, typename T = typename enable_if < !is_same<T_container, string>::value, typename T_container::value_type >::type > ostream & operator<<(ostream &os, const T_container &a) { os << '{'; string sep; for (const T &x : a) os << sep << x, sep = ", "; return os << '}';}
void debug() {cerr << endl;}
template <typename Head, typename... Tail> void debug(Head h, Tail... t) {cerr << h << ' '; debug(t...);}
#ifdef singlabharat
#define debug(...) cerr << "(" << #__VA_ARGS__ << ") : ", debug(__VA_ARGS__)
#else
#define debug(...)
#endif
#define endl '\n'
const int MX = 2e5 + 2, MOD = 1e9 + 7, INF = 1e6;
void solve() {
int n;
cin >> n;
vi cur_idcs;
map<int, vi> col_idcs;
vi col(n);
fo(i, n) {
int c;
cin >> c;
col[i] = c;
if (!empty(col_idcs[c])) {
int j = col_idcs[c].back();
while (cur_idcs.back() != j) {
col_idcs[col[cur_idcs.back()]].pop_back();
cur_idcs.pop_back();
}
}
cur_idcs.pb(i);
col_idcs[c].pb(i);
}
int ptr = 0;
int c = -1;
fo(i, n) {
if (i == cur_idcs[ptr]) c = col[cur_idcs[ptr++]];
cout << c << endl;
}
}
int32_t main() {
#ifdef singlabharat
freopen("error.txt", "w", stderr);
#endif
cin.tie(0)->sync_with_stdio(0);
int t = 1;
// cin >> t;
for (int tc = 1; tc <= t; tc++) {
// cout << "Case #" << tc << ": ";
solve();
}
}
