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Submission #671244

# Submission time Handle Problem Language Result Execution time Memory
671244 2022-12-12T13:49:17 Z adaawf Balloons (CEOI11_bal) C++14
100 / 100
 540 ms 7044 KB 
#include <iostream>
#include <stack>
#include <iomanip>
using namespace std;
double res[1000005];
int main() {
    int n;
    cin >> n;
    stack<pair<double, double>> s;
    for (int i = 0; i < n; i++){
        double x, r, mi;
        cin >> x >> r;
        mi = r;
        while (!s.empty()) {
            pair<double, double> p = s.top();
            mi = min(mi, (p.first - x) * (p.first - x) / (p.second * 4));
            if (mi >= p.second) {
                s.pop();
            }
            else break;
        }
        s.push(make_pair(x, mi));
        res[i] = mi;
    }
    cout << fixed << setprecision(3);
    for (int i = 0; i < n; i++) {
        cout << res[i] << endl;
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 308 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 312 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 340 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 828 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 1880 KB 50000 numbers
2 Correct 149 ms 1868 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 292 ms 3452 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 321 ms 4032 KB 115362 numbers
2 Correct 328 ms 4308 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 418 ms 5144 KB 154271 numbers
2 Correct 534 ms 6888 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 520 ms 6124 KB 200000 numbers
2 Correct 540 ms 7044 KB 199945 numbers