Submission #781749

#	Time	Username	Problem	Language	Result	Execution time	Memory
781749		borisAngelov	Stone Arranging 2 (JOI23_ho_t1)	C++17	100 / 100	127 ms	16220 KiB

Main

#include <bits/stdc++.h>

using namespace std;

const int maxn = 200005;

int n;

int a[maxn];

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n;

    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
    }

    multiset<int> s;
    stack<pair<int, int>> st;

    for (int i = 1; i <= n; ++i)
    {
        if (s.find(a[i]) == s.end())
        {
            //cout << "here for " << i << endl;
            st.push(make_pair(a[i], i));
            s.insert(a[i]);
        }
        else
        {
            //cout << "popping on " << i << ' ' << st.size() << endl;
            while (st.top().first != a[i])
            {
                //cout << "removing " << st.top().first << ' ' << st.top().second << endl;
                s.erase(s.find(st.top().first));
                st.pop();
            }
        }
    }

    int last = n;

    while (!st.empty())
    {
        int col = st.top().first;
        int idx = st.top().second;
        st.pop();

        for (int i = last; i >= idx; --i)
        {
            a[i] = col;
        }

        last = idx - 1;
    }

    for (int i = 1; i <= n; ++i)
    {
        cout << a[i] << "\n";
    }

    return 0;
}

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