Submission #667982

#	Time	Username	Problem	Language	Result	Execution time	Memory
667982		bashkort	Lightning Rod (NOI18_lightningrod)	C++17	14 / 100	1990 ms	226928 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    vector<int> x(n), y(n);
    for (int i = 0; i < n; ++i) {
        int a, b;
        cin >> a >> b;
        x[i] = a - b, y[i] = a + b;
    }

    vector<int> ord(n);
    iota(ord.begin(), ord.end(), 0);
    sort(ord.begin(), ord.end(), [&](int i, int j) {
        return pair{x[i], -y[i]} < pair{x[j], -y[j]};
    });

    int mx = 0;
    int ans = 0;
    for (int i : ord) {
        if (mx < y[i]) {
            mx = y[i];
            ans += 1;
        }
    }

    cout << ans << '\n';

    return 0;
}

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