Submission #960495

#	Time	Username	Problem	Language	Result	Execution time	Memory
960495		dubabuba	Balloons (CEOI11_bal)	C++14	10 / 100	221 ms	15184 KiB

bal

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

typedef double d64;
typedef long long i64;
typedef pair<int, int> pii;
#define MP make_pair
#define ss second
#define ff first

const int mxn = 1e6 + 10;
d64 x[mxn], r[mxn], ans[mxn];
int n;

d64 mx(int L, int R) {
	d64 dx = x[R] - x[L];
	return dx * dx / (4.0 * ans[L]);
}

int main() {
	cin >> n;
	for(int i = 1; i <= n; i++)
		cin >> x[i] >> r[i];

	ans[1] = r[1];
	vector<int> vec;
	vec.push_back(1);

	for(int i = 2; i <= n; i++) {
		while(vec.size() > 1 && mx(vec.back(), i) <= mx(vec[vec.size() - 1], i))
			vec.pop_back();
		ans[i] = min(mx(vec.back(), i), r[i]);
		vec.push_back(i);
	}

	cout << fixed << setprecision(3);
	for(int i = 1; i <= n; i++)
		cout << ans[i] << '\n';
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10