Submission #1331894

#TimeUsernameProblemLanguageResultExecution timeMemory
1331894kawhietStone Arranging 2 (JOI23_ho_t1)C++20
100 / 100
236 ms25196 KiB
#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 47
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    auto b = a;
    ranges::sort(b);
    b.erase(unique(b.begin(), b.end()), b.end());
    map<int, int> m;
    for (int i = 0; i < n; i++) {
        int x = ranges::lower_bound(b, a[i]) - b.begin();
        m[x] = a[i];
        a[i] = x;
    }
    vector<int> f(n, -1);
    set<array<int, 2>> s;
    for (int i = 0; i < n; i++) {
        if (f[a[i]] == -1) {
            f[a[i]] = i;
            s.insert({i, a[i]});
        } else {
            int k = f[a[i]];
            while (true) {
                auto it = s.lower_bound({k + 1, 0});
                if (it == s.end()) break;
                f[(*it)[1]] = -1;
                s.erase(it);
            }
        }
    }
    vector<array<int, 2>> v;
    for (auto [x, y] : s) {
        v.push_back({x, m[y]});
    }
    int pos = 0;
    for (int i = 0; i < v.size() - 1; i++) {
        while (pos < v[i + 1][0]) {
            cout << v[i][1] << ' ';
            pos++;
        }
    }
    while (pos < n) {
        cout << v.back()[1] << ' ';
        pos++;
    }
    cout << '\n';
    return 0;
}
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