Submission #743098

#	Time	Username	Problem	Language	Result	Execution time	Memory
743098		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	40 / 100	2083 ms	197972 KiB

Main

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

#define iii tuple<int,int,int>
int n;

struct top
{
    int x,y,sta;
};

vector<top> top;
bool allone;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for(int i=1;i<=n;++i)
    {
        int x,y;
        cin >> x >> y;
        if(y != 1) allone = false;
        top.push_back({x,y,1});
    }
    if(allone)
    {
        cout << n;
        return 0;
    }
    for(int i=0;i<n;++i)
    {
        for(int j=0;j<n;++j)
        {
            if(i == j) continue;
            if(abs(top[i].x-top[j].x) <= top[i].y-top[j].y)
            {
                top[j].sta = 0;
            }
        }
    }
    int cnt = 0;
    for(int i=0;i<n;++i)
    {
        if(top[i].sta == 1) ++cnt;
    }
    cout << cnt;
    return 0;
}

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