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Submission #714524

# Submission time Handle Problem Language Result Execution time Memory
714524 2023-03-24T22:17:11 Z stevancv Balloons (CEOI11_bal) C++14
100 / 100
 215 ms 5508 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const int M = 1e6 + 2;
const ll linf = 1e18;
ld F(ld xi, ld xj, ld rj) {
    ld c = (xi - xj) * (xi - xj);
    c /= 4 * rj;
    return c;
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n; cin >> n;
    stack<pair<ld, ld>> s;
    for (int i = 0; i < n; i++) {
        ld x, y;
        cin >> x >> y;
        while (!s.empty()) {
            smin(y, F(x, s.top().first, s.top().second));
            if (y >= s.top().second) s.pop();
            else break;
        }
        cout << fixed << showpoint << setprecision(3) << y << en;
        s.push({x, y});
    }
    return 0;
}

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 0 ms 320 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 340 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 616 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 1776 KB 50000 numbers
2 Correct 54 ms 1528 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 2840 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 151 ms 3320 KB 115362 numbers
2 Correct 136 ms 3432 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 4056 KB 154271 numbers
2 Correct 199 ms 5508 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 215 ms 4652 KB 200000 numbers
2 Correct 204 ms 5484 KB 199945 numbers