제출 #818468

#제출 시각아이디문제언어결과실행 시간메모리
818468null_aweAdvertisement 2 (JOI23_ho_t2)C++14
100 / 100
444 ms34636 KiB
#include <bits/stdc++.h> using namespace std; int main() { int n; cin >> n; vector<pair<int, int>> arr(n); for (int i = 0; i < n; ++i) cin >> arr[i].second >> arr[i].first; sort(arr.begin(), arr.end()); reverse(arr.begin(), arr.end()); set<pair<int, int>> given; given.insert({0, 0}); given.insert({1000000007, 0}); int ans = 0; for (pair<int, int> p : arr) { int x = p.second, e = p.first; pair<int, int> r = *given.upper_bound({x, e}), l = *--given.upper_bound({x, e}); if (abs(r.first - x) <= r.second - e || abs(l.first - x) <= l.second - e) continue; ++ans; given.insert({x, e}); } cout << ans << '\n'; return 0; }
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