Submission #667989

#	Time	Username	Problem	Language	Result	Execution time	Memory
667989		bashkort	Lightning Rod (NOI18_lightningrod)	C++17	80 / 100	2078 ms	78312 KiB

Main

#include <bits/stdc++.h>

using namespace std;

constexpr int N = 10000000;

pair<int, int> p[N];

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

    int n;
    cin >> n;

    for (int i = 0; i < n; ++i) {
        int a, b;
        cin >> a >> b;
        p[i].first = a + b, p[i].second = b - a;
    }

    sort(p, p + n);

    int ans = 0, mx = -1e9;
    for (int i = n - 1; i >= 0; --i) {
        ans += (mx < p[i].second && (mx = p[i].second, 1));
    }

    cout << ans << '\n';

    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: 0 / 20