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Submission #1027265

# Submission time Handle Problem Language Result Execution time Memory
1027265 2024-07-19T02:58:02 Z vjudge1 Sure Bet (CEOI17_sure) C++14
100 / 100
 66 ms 3552 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    int n;
    cin >> n;
    double a[n + 1], b[n + 1];
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
    }
    sort(a + 1, a + n + 1, greater<double>());
    sort(b + 1, b + n + 1, greater<double>());
    double prefA[n + 1] = {0}, prefB[n + 1] = {0};
    prefA[1] = a[1];
    prefB[1] = b[1];
    for (int i = 2; i <= n; i++)
    {
        prefA[i] = prefA[i - 1] + a[i];
        prefB[i] = prefB[i - 1] + b[i];
    }
    double ans = 0;
    for (int i = 1; i <= n; i++)
    {
        int l = 1, r = n;
        while (r - l > 1)
        {
            int mid = l + (r - l) / 2;
            double valmid = min(prefA[i] - (double)i - (double)mid, prefB[mid] - (double)i - (double)mid);
            double valnxt = min(prefA[i] - (double)i - (double)(mid+1), prefB[mid+1] - (double)i - (double)(mid+1));

            if (valmid > valnxt)
            {
                r = mid;
            }
            else
            {
                l = mid;
            }
        }
        double vall = min(prefA[i] - (double)i - (double)l, prefB[l] - (double)i - (double)l);
        double valr = min(prefA[i] - (double)i - (double)r, prefB[r] - (double)i - (double)r);
        if (vall > valr)
        {
            ans = max(ans, vall);
        }
        else
        {
            ans = max(ans, valr);
        }
    }
    cout << fixed << setprecision(4) << ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 54 ms 3408 KB Output is correct
18 Correct 65 ms 3408 KB Output is correct
19 Correct 66 ms 3408 KB Output is correct
20 Correct 53 ms 3412 KB Output is correct
21 Correct 59 ms 3552 KB Output is correct
22 Correct 55 ms 3420 KB Output is correct
23 Correct 53 ms 3548 KB Output is correct
24 Correct 55 ms 3412 KB Output is correct
25 Correct 54 ms 3412 KB Output is correct
26 Correct 60 ms 3536 KB Output is correct