Submission #1187480

#	Time	Username	Problem	Language	Result	Execution time	Memory
1187480		nxdxme	Lightning Rod (NOI18_lightningrod)	C++20	66 / 100	1097 ms	27288 KiB

Main

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

int n, x, y;
stack<pair<int, int>> st;

int main() {
    // cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n;
    for (int i = 0; i < n; ++i) {
        cin >> x >> y;
        if (st.empty()) {
            st.emplace(x, y);
            continue;
        }
        auto [tx, ty] = st.top();
        if (abs(tx - x) <= ty - y) {
            continue;
        }
        while (not st.empty() and abs(x - st.top().first) <= y - st.top().second) {
            st.pop();
        }
        st.emplace(x, y);
    }
    cout << st.size() << '\n';
    while (not st.empty()) {
        auto [tx, ty] = st.top();
        st.pop();
        // cout << tx << ' ' << ty << '\n';
    }
}

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