Submission #924629

#	Time	Username	Problem	Language	Result	Execution time	Memory
924629		esomer	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	181 ms	33204 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int N; cin >> N;
	vector<pair<int, int>> v(N);
	for(int i = 0; i < N; i++){
		cin >> v[i].first >> v[i].second;
	}
	sort(v.begin(), v.end());
	int useless = 0;
	set<pair<int, int>> left;
	int mxVal = -2e9;
	for(int i = 0; i < N; i++){
		int val1 = v[i].second - v[i].first;
		int val2 = v[i].first + v[i].second;
		if(mxVal >= val2){
			useless++;
			continue;
		}
		mxVal = val2;
		while(!left.empty() && (*left.begin()).first <= val1){
			useless++;
			left.erase(left.begin());
		}
		left.insert({val1, i});
	}
	cout << N - useless << "\n";
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31