제출 #925394

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
925394		Akshat369	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	132 ms	24924 KiB

Main

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define INF (int)1e18
#define endl '\n'
const int mod = 1000 * 1000 * 1000 + 7;
const int N = 100005;
#define f first
#define s second
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define rrep(i, a, b) for(int i = (a); i > (b); i--)
#define vi vector<int>
#define pii pair<int, int>

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() {
    int n; cin>>n;
    vector<pair<int,int> > a(n);
    for (int i = 0; i < n; ++i) {
        cin>>a[i].first>>a[i].second;
    }
    sort(a.begin(), a.end());
    stack<pair<int,int>> st;
    for (int i = 0; i < n; ++i) {
        if (!st.empty() && a[i].first-st.top().first <= st.top().second - a[i].second) continue;
        while (!st.empty() && a[i].first - st.top().first <= a[i].second - st.top().second) st.pop();
        st.push(a[i]);
    }
    cout<<st.size()<<endl;
}

int32_t main() {
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(false);
    cin.tie(0);


    int t = 1;
  //  cin >> t;
    for (int i = 1; i <= t; i++) {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
    return 0;
}

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