Submission #703195

#	Time	Username	Problem	Language	Result	Execution time	Memory
703195		Markomafko972	Balloons (CEOI11_bal)	C++14	100 / 100	188 ms	8548 KiB

bal

#include <bits/stdc++.h>
#define X first
#define Y second
#define pb push_back
#define pii pair<int, int>
typedef long long ll;
using namespace std;

const int MOD = 1e9 + 7;
const ll INF = 1e18;
const int OFF = (1 << 20);

int n;
int pos;
long double r;
stack< pair<long double, int> > s;
long double sol[200005];

int main () {

	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> pos >> r;
		long double naj = r;
		while (s.size() > 0) {
			long double tren = s.top().Y-pos;
			tren *= tren;
			tren /= 4;
			tren /= s.top().X;
		
			if (tren <= naj) {
				if (tren < s.top().X) {
					naj = min(naj, tren);
					break;
				}
				else {
					s.pop();
					//if (tren > naj) break;
					naj = min(naj, tren);
				}
			}
			else {
				if (naj < s.top().X) break;
				else s.pop();
			}
		}
		sol[i] = naj;
		s.push({naj, pos});
	}
	
	for (int i = 0; i < n; i++) cout << fixed << setprecision(3) << sol[i] << "\n";

	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10