Submission #1125964

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125964		Kel_Mahmut	Road Construction (JOI21_road_construction)	C++20	18 / 100	215 ms	7628 KiB

road_construction

#include <bits/stdc++.h>
#define pb push_back
#define endl ("\n")
#define all(aa) aa.begin(), aa.end()
typedef long long ll;
using namespace std;

int main(){
	int n, k;
	cin >> n >> k;
	vector<pair<ll, ll>> v(n);
	for(int i = 0; i < n; i++) cin >> v[i].first >> v[i].second;

	if(n <= 1000){
		auto calc = [&](pair<ll, ll> a, pair<ll, ll> b){
			return abs(a.first - b.first) + abs(a.second - b.second);
		};

		priority_queue<ll, vector<ll>, greater<ll>> pq;
		for(int i = 0; i < n; i++){
			for(int j = i + 1; j < n; j++){
				pq.push(calc(v[i], v[j]));
			}
		}

		for(int i = 0; i < k; i++){
			cout << pq.top() << endl;
			pq.pop();
		}
		exit(0);
	}

	auto calc = [&](pair<ll, ll> a, pair<ll, ll> b){
		return abs(a.first - b.first) + abs(a.second - b.second);
	};

	sort(all(v));
	auto check = [&](ll l){
		int cnt = 0;
		for(int i = 0; i < n; i++){
			for(int j = i + 1; j < n; j++){
				if(calc(v[i], v[j]) <= l)
					cnt++;
				else
					break;
			}
			if(cnt >= k) break;
		}

		return cnt >= k;
	};

	ll tl = 0, tr = 1e12;
	while(tr - tl > 1){
		ll tm = (tl + tr) / 2;
		if(check(tm))
			tr = tm;
		else 
			tl = tm;
	}

	priority_queue<ll, vector<ll>, greater<ll>> pq;
	for(int i = 0; i < n; i++){
		for(int j = i + 1; j < n; j++){
			if(calc(v[i], v[j]) < tr)
				pq.push(calc(v[i], v[j]));
			else
				break;
		}
	}

	assert(pq.size() < k);

	while( (int) pq.size() < k){
		pq.push(tr);
	}

	for(int i = 0; i < k; i++){
		cout << pq.top() << endl;
		pq.pop();
	}
}

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35