Submission #537737

#	Time	Username	Problem	Language	Result	Execution time	Memory
537737		timreizin	Rice Hub (IOI11_ricehub)	C++17	100 / 100	22 ms	2260 KiB

ricehub

#include "ricehub.h"
#include <vector>
#include <algorithm>
#include <numeric>

using namespace std;

using ll = long long;

int besthub(int n, int , int X[], ll b)
{
    vector<ll> x(n);
    for (int i = 0; i < n; ++i) x[i] = X[i];
    sort(x.begin(), x.end());
    vector<ll> pref(n);
    partial_sum(x.begin(), x.end(), pref.begin());
    int maxRes = 0;
    for (int i = 0; i < n; ++i)
    {
        int l = 0, r = n - i;
        while (l < r)
        {
            int m = (l + r) >> 1;
            int e = i + m;
            int v = (i + e) >> 1;
            ll sum = pref[e] - pref[v];
            if (v != 0) sum -= pref[v - 1] - (i == 0 ? 0ll : pref[i - 1]);
            if (i % 2 != e % 2) sum -= x[v];
            if (sum <= b) l = m + 1;
            else r = m;

        }
        maxRes = max(maxRes, l);
    }
    return maxRes;
}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32