Submission #743947

#	Time	Username	Problem	Language	Result	Execution time	Memory
743947		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	21 / 100	1472 ms	79748 KiB

Main

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

struct point
{
    int x,y;
};

int n;
vector<point> vec;

int cnt = 0;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    stack<point> st;
    for(int i=0;i<n;++i)
    {
        int a,b;
        cin >> a >> b;
        if(!st.empty() && b < st.top().y && abs(a-st.top().x) <= st.top().y-b) continue;
        if(!st.empty() && b > st.top().y && abs(a-st.top().x) <= b-st.top().y)
        {
            st.push({a,b});
            continue;
        }
        ++cnt;
        st.push({a,b});
    }
    cout << cnt;
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 10 / 10
• Subtask 7: 0 / 20