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Submission #92948

# Submission time Handle Problem Language Result Execution time Memory
92948 2019-01-06T08:41:27 Z Kastanda Sure Bet (CEOI17_sure) C++11
60 / 100
 97 ms 3348 KB 
#include<bits/stdc++.h>
using namespace std;
const int N = 100005;
int n;
long long A[N], B[N];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0); cin >> n;
    for (int i = 1; i <= n; i++)
    {
        long double a, b;
        cin >> a >> b;
        A[i] = (int)(a * 1000000);
        B[i] = (int)(b * 1000000);
    }
    sort(A + 1, A + n + 1);
    sort(B + 1, B + n + 1);
    reverse(A + 1, A + n + 1);
    reverse(B + 1, B + n + 1);
    for (int i = 1; i <= n; i++)
    {
        A[i] += A[i - 1];
        B[i] += B[i - 1];
    }
    long long Mx = 0;
    for (int k = 1; k <= n + n; k ++)
    {
        int l = 0, r = k, md;
        if (k > n)
            l = k - n, r = n;
        while (r - l > 1)
        {
            md = (l + r) >> 1;
            if (B[md] >= A[k - md])
                r = md;
            else
                l = md;
        }
        for (int i = max(k - n, l - 2); i <= min(n, r + 2); i++)
            Mx = max(Mx, min(B[i], A[k - i]) - k * 1000000);
    }
    long double res = Mx; res /= (long double)(1000000.0);
    cout << fixed << setprecision(4) << res << endl;
    return (0);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Incorrect 97 ms 3348 KB Output isn't correct
18 Halted 0 ms 0 KB -