Submission #916480

#	Time	Username	Problem	Language	Result	Execution time	Memory
916480		GrandTiger1729	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	602 ms	37520 KiB

Main

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

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    vector<pair<int, int>> a(n);

    for (int i = 0; i < n; i++)
    {
        cin >> a[i].first >> a[i].second;
    }
    multiset<pair<int, int>> st(a.begin(), a.end());
    sort(a.begin(), a.end(), [&](auto x, auto y)
    {
        return x.second > y.second;
    });
    int ans = 0;
    for (int i = 0; i < n; i++)
    {
        if (st.find(a[i]) == st.end())
        {
            continue;
        }
        ans++;
        auto it = st.find(a[i]);
        while (it != st.begin())
        {
            auto it2 = it;
            it2--;
            if (abs(a[i].first - it2->first) <= a[i].second - it2->second)
            {
                st.erase(it2);
            }
            else
            {
                break;
            }
        }
        while (it != st.end())
        {
            auto it2 = it;
            it++;
            if (abs(a[i].first - it2->first) <= a[i].second - it2->second)
            {
                st.erase(it2);
            }
            else
            {
                break;
            }
        }
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31