Submission #785524

#	Time	Username	Problem	Language	Result	Execution time	Memory
785524		12345678	Lightning Rod (NOI18_lightningrod)	C++17	100 / 100	1501 ms	191652 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int n, x, y, h;
stack<pair<int, int>> s;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    for (int i=1; i<=n; i++)
    {
        cin>>x>>y;
        if (s.empty())
        {
            s.push({x, y});
            continue;
        }
        if (s.top().second-y>=x-s.top().first) continue;
        while (!s.empty()&&y-s.top().second>=x-s.top().first) s.pop();
        s.push({x, y});
    }
    cout<<s.size();
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 20 / 20