Submission #245924

#	Time	Username	Problem	Language	Result	Execution time	Memory
245924		zecookiez	Lightning Rod (NOI18_lightningrod)	C++14	76 / 100	2068 ms	198072 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main() {
    cin.sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n; cin >> n;
    vector<pair<int, int>> st;
    for(int x, y, i = 0; i < n; ++i){
        cin >> x >> y;
        bool add = true;
        while(!st.empty()){
            // current building bad
            if(x + y <= st.back().second + st.back().first){ add = false; break; }
            // previous building bad
            if(x - y <= st.back().first - st.back().second){ st.pop_back();}
            else break;
        }
        if(add) st.emplace_back(x, y);
    }
    cout << st.size() << "\n";
    return 0;
}

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