제출 #1102633

#제출 시각아이디문제언어결과실행 시간메모리
1102633ramzialoulouAdvertisement 2 (JOI23_ho_t2)C++17
100 / 100
118 ms13900 KiB
#include <bits/stdc++.h> using namespace std; #ifdef Ramzi #include "debug.h" #else #define debug(...) #endif int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n; cin >> n; vector<pair<int ,int>> p(n); for (int i = 0; i < n; i++) { int x, e; cin >> x >> e; p[i].first = x - e; p[i].second = x + e; } auto com = [&](pair<int, int> &a, pair<int, int> &b) -> bool { if (a.first != b.first) { return a.first < b.first; } return a.second > b.second; }; sort(p.begin(), p.end(), com); int ans = 0, mx = 0; for (auto [f, s] : p) { if (s > mx) { ans += 1; mx = s; } } cout << ans << "\n"; /* * |Xi - Xj| <= Ei - Ej * Xi - Ei <= Xj - Ej this * Xj + Ej <= Ei + Xi this * 4 2 * 2 3 * 3 4 * 6 5 */ }
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