Submission #789091

#	Time	Username	Problem	Language	Result	Execution time	Memory
789091		ono_de206	Advertisement 2 (JOI23_ho_t2)	C++14	0 / 100	1 ms	316 KiB

Main

#include<bits/stdc++.h>
using namespace std;

#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

#define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
typedef pair<int, int> P;

template<typename T, typename U>
ostream & operator << (ostream &out, const pair<T, U> &c) {
	out << c.first << ' ' << c.second;
	return out;
}

template<typename T>
ostream & operator << (ostream &out, vector<T> &v) {
	const int sz = v.size();
	for (int i = 0; i < sz; i++) {
		if (i) out << ' ';
		out << v[i];
	}
	return out;
}

template<typename T>
istream & operator >> (istream &in, vector<T> &v) {
	for (T &x : v) in >> x;
	return in;
}

template<typename T, typename U>
	istream & operator >> (istream &in, pair<T, U> &c) {
	in >> c.first;
	in >> c.second;
	return in;
}

template<typename T>
void mxx(T &a, T b){if(b > a) a = b;}
template<typename T>
void mnn(T &a, T b){if(b < a) a = b;}

const int mxn = 5e5 + 10, inf = 1e18 + 10;

void go() {
	int n;
	cin >> n;
	vector<pair<int, int>> a(n);
	for(int i = 0; i < n; i++) {
		cin >> a[i].ff >> a[i].ss;
	}
	sort(all(a));
	a.erase(unique(all(a)), a.end());
	n = a.size();

	int ans1 = 0, ans2 = 0;
	vector<pair<int, int>> v;
	for(int i = 0; i < n; i++) {
		v.eb(a[i].ff - a[i].ss, a[i].ff);
	}
	sort(all(v));
	reverse(all(v));
	int ls = -inf;
	for(int i = 0; i < n; i++) {
		if(v[i].ss > ls) {
			ans1++;
			ls = v[i].ss;
		}
	}

	v.clear();
	for(int i = 0; i < n; i++) {
		v.eb(-a[i].ff - a[i].ss, a[i].ff);
	}
	sort(all(v), [&](pair<int, int> a, pair<int, int> b) {
		if(a.ff == b.ff) return a.ss < b.ss;
		else return a.ff > b.ff;
	});
	ls = inf;
	for(int i = 0; i < n; i++) {
		if(v[i].ss < ls) {
			ans2++;
			ls = v[i].ss;
		}
	}
	// cout << ans1 << ' ' << ans2 << '\n';
	cout << max(ans1, ans2) << '\n';
}

signed main() {
	fast;
	int t = 1;
	// cin >> t;
	while(t--) {
		go();
	}
	return 0;
}

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