Submission #1048534

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048534		lamagril	Lightning Rod (NOI18_lightningrod)	C++14	100 / 100	1160 ms	145616 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main(){
    cin.tie(NULL)->sync_with_stdio(false);
    int n; cin >> n;
    stack<pair<int,int>> s;
    int a,b; cin >> a >> b;
    s.push({a,b});
    for(int ti=2 ; ti<=n ; ti++){
        int a,b; cin >> a >> b;
        bool bo=false;
        while(!s.empty() && a-s.top().first<=b-s.top().second){
            s.pop();
            bo=true;
        }
        if(bo){
            s.push({a,b});
            continue;
        }
        if(abs(s.top().first-a)<=s.top().second-b){
            continue;
        }
        s.push({a,b});
    }
    cout << s.size() << '\n';
}

• 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