Submission #531412

#	Time	Username	Problem	Language	Result	Execution time	Memory
531412		Cantfindme	Balloons (CEOI11_bal)	C++17	100 / 100	233 ms	8800 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define f first
#define s second
#define FAST ios_base::sync_with_stdio(0); cin.tie(0);
#define all(x) x.begin(),x.end()

typedef long double ld;
typedef pair<ld,ld> pi;

const int maxn = 200010;
const int INF = LLONG_MAX/2;
const int mod = 1e9+7;

int n;
ld x[maxn], r[maxn];

int32_t main() {
	FAST
	// #ifndef ONLINE_JUDGE
	// 	ifstream cin("input.txt");
	// #endif

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

	stack <pi> s;
	for (int i =1;i<=n;i++) {
		while (!s.empty()) {
			auto [xp, rp] = s.top(); 
			r[i] = min(r[i], (x[i] - xp) * (x[i] - xp) / (4 * rp));
			if (r[i] >= rp) s.pop();
			else break;
		}
		s.push(pi(x[i], r[i]));
	}

	for (int i =1;i<=n;i++) cout << fixed << setprecision(6) << r[i] << "\n";

}

• 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