제출 #1322996

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1322996		aaaaaaaa	Advertisement 2 (JOI23_ho_t2)	C++20	59 / 100	2093 ms	3452 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
const int inf = 1e18;
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);
    int n;
    cin >> n;
    vector<pair<int, int>> v;
    for(int i = 1, x, e; i <= n; ++i){
        cin >> x >> e;
        v.push_back({x - e, x + e});
    }
    // xi - xj <= ei - ej
    // xi - ei <= xj - ej
    // xi + ei >= ej + xj
    sort(all(v), [&](pair<int, int> x, pair<int, int> y){
        if(x.first == y.first) return x.second > y.second;
        return x.first < y.first;
    });
    //v.erase(unique(v.begin(), v.end()), v.end());
    vector<int> dp(n, 0);
    dp[0] = 1;
    for(int j = 0; j < n; ++j){
        dp[j] = 1;
        for(int i = j - 1; i >= 0; --i){
            if(v[i].second >= v[j].second){
                dp[j] = 0;
            }
        }
    }
    int sum = 0;
    for(int j = 0; j < n; ++j) sum += dp[j];
    cout << sum << "\n";
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 0 / 31