제출 #670282

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
670282		RadicaI	Mobile (BOI12_mobile)	C++17	0 / 100	759 ms	15928 KiB

mobile

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
	cout.precision(4);
	int n,siz; cin >> n>>siz;
	pair<ll, ll> stations[n];
	for(int i=0; i<n; i++) cin >> stations[i].first >> stations[i].second;
	double l = 1; double r = 2e9;
	while(r - l > 1e-3){
		double m = (l+r)/2.0;
		set<pair<double, int> > endp; double store=0;
		for(int i=0; i<n; i++){
			if(abs(stations[i].second) <=m){
				double ph = stations[i].first + sqrt(m*m-stations[i].second*stations[i].second);
				double pl = stations[i].first - sqrt(m*m-stations[i].second*stations[i].second);
				if(pl<=store) store = max(store, ph);
			}
		}
		if(store>=siz) r=m;
		else l=m;
		
	}
	cout << l;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 4
• Subtask 3: 0 / 4
• Subtask 4: 0 / 4
• Subtask 5: 0 / 4
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
• Subtask 12: 0 / 5
• Subtask 13: 0 / 5
• Subtask 14: 0 / 5
• Subtask 15: 0 / 5
• Subtask 16: 0 / 5
• Subtask 17: 0 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
• Subtask 20: 0 / 5
• Subtask 21: 0 / 5