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Submission #1013144

# Submission time Handle Problem Language Result Execution time Memory
1013144 2024-07-03T08:25:51 Z nrg_studio Balloons (CEOI11_bal) C++17
100 / 100
 147 ms 5564 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define FOR(i, a, b, s) for (int i = (a); i < (b); i += s)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define pii pair<ld,ld>
#define mp make_pair
#define f first
#define s second

int main() {
	ios::sync_with_stdio(false); cin.tie(0);
	
	int n; cin >> n;
	ld x, r;
	stack<pii> s;
	cout << fixed << setprecision(3);
	F0R(i,n) {
		cin >> x >> r;
		ld r1 = r;
		while (s.size()) {
			pii p = s.top(); 
			ld cand = min((ld)(x-p.f)*(x-p.f)/(p.s*4.0),r);
			if (cand <= r1) {r1 = cand;}
			//else {while (s.size()&&s.top().s <= r1) {s.pop();} break;}
			if (r1 >= p.s) {s.pop();}
			else {break;}
		} s.push({x,r1});
		cout << r1 << '\n';
	} 
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 860 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 1592 KB 50000 numbers
2 Correct 33 ms 1372 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 2384 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 2640 KB 115362 numbers
2 Correct 86 ms 2536 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 3156 KB 154271 numbers
2 Correct 131 ms 5456 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 147 ms 3680 KB 200000 numbers
2 Correct 130 ms 5564 KB 199945 numbers