Submission #743830

#	Time	Username	Problem	Language	Result	Execution time	Memory
743830		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	100 / 100	1688 ms	82124 KiB

Main

#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
stack<pair<int,int>> st;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    int n; cin >> n;
    while (n--) {
        int a,b; cin >> a >> b;
        if (!st.empty() && abs(a - st.top().x) <= st.top().y - b) continue;
        while (!st.empty() && abs(a - st.top().x) <= b - st.top().y) st.pop();
        
        st.push({a, b});
    }
    cout << st.size();
    return 0;
}

• 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