Submission #855229

#	Time	Username	Problem	Language	Result	Execution time	Memory
855229		mzh	Stone Arranging 2 (JOI23_ho_t1)	C++17	100 / 100	61 ms	13808 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define all(x) begin(x), end(x)

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];
    }

    vector<pair<int, int>> stones;
    unordered_map<int, int> freq;
    for (int i = 0; i < n; i++) {
        int to_add = 1;
        if (freq[a[i]] > 0) {
            while (stones.back().first != a[i]) {
                to_add += stones.back().second;
                freq[stones.back().first] -= stones.back().second;
                stones.pop_back();
            }
        }
        if (stones.empty() || stones.back().first != a[i]) {
            stones.push_back({a[i], 0});
        }
        stones.back().second += to_add;
        freq[a[i]] += to_add;
    }

    for (auto p : stones) {
        for (int i = 0; i < p.second; i++) {
            cout << p.first << ' ';
        }
    }
    cout << '\n';

    return 0;
}

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40