Submission #755771

#TimeUsernameProblemLanguageResultExecution timeMemory
755771Dan4LifeRoad Construction (JOI21_road_construction)C++17
100 / 100
2219 ms15320 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
const int mxN = (int)2.5e5+10;
int n, K;
vector<int> ans;
vector<array<int,2>> v;

int calc(int i, int j){ return max(abs(v[i][0]-v[j][0]),abs(v[i][1]-v[j][1])); }

bool chk(int d){
	set<pair<int,int>> S; S.clear(); ans.clear();
	for(int i=0, j=0; i < n and sz(ans)<K; i++){
		while(v[i][0]-v[j][0]>d) S.erase({v[j][1],j}), j++;
		auto itr1 = S.lower_bound({v[i][1]-d,-1});
		auto itr2 = S.lower_bound({v[i][1]+d+1,-1});
		while(itr1!=itr2 and sz(ans)<K)
			ans.pb(calc(itr1->second,i)), itr1++;
		S.insert({v[i][1],i});
	}
	return sz(ans)>=K;
}

int32_t main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> K; int x, y;
	for(int i = 0; i < n; i++)
		cin >> x >> y, v.pb({x+y,x-y});
	sort(all(v));
	int l = 0, r = (int)4e9;
	while(l<r){
		int mid = (l+r)>>1;
		if(chk(mid)) r=mid;
		else l=mid+1;
	}
	chk(l-1); sort(all(ans)); while(sz(ans)<K) ans.pb(l);
	for(auto u : ans) cout << u << "\n";
}
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