Submission #1003181

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003181		vjudge1	Rice Hub (IOI11_ricehub)	C++17	17 / 100	55 ms	3420 KiB

ricehub

#include<bits/stdc++.h>
#include "ricehub.h"
#define ll long long
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define f first
#define s second
#define pb push_back
#define p_b pop_back
using namespace std;
int besthub(int R, int L, int X[], long long B)
{
    ll n = R, i;
    ll h[n+5], pref[n+5];
    pref[0] = 0;
    for(i = 1; i <= n; i++)
        h[i] = X[i-1];
    for(i = 1; i <= n; i++)
        pref[i] = pref[i-1] + h[i];
    ll res = 0;
    for(i = 1; i <= n; i++)
    {
        ll l = i, r = n, ans = i;
        //cout << "i: " << i << "\n";
        while(l <= r)
        {
            ll mid = (l + r) / 2;
            ll rh = (h[mid] + h[i]) / 2;
            ll tl = i, tr = mid, ok = i;
            //cout << "mid: " << mid << " rh: " << rh << " tmid: ";
            while(tl <= tr)
            {
                ll tmid = (tl + tr) / 2;
                if(h[tmid] > rh)
                    tr = tmid - 1;
                else{
                    ok = max(ok, tmid);
                    tl = tmid + 1;
                }
            }
            ll tmid = ok;
            //cout << tmid << " sum1: ";
            ll sum1 = rh * (tmid - i + 1) - (pref[tmid] - pref[i-1]);
            ll sum2 = pref[mid] - pref[tmid] - (mid - tmid) * rh;
            ll sum = sum1 + sum2;
            //cout << sum1 << " sum2: " << sum2 << " sum: " << sum << "\n";
            if(sum > B)
                r = mid - 1;
            else
            {
                ans = max(ans, mid);
                l = mid + 1;
            }
        }
        res = max(res, ans - i + 1);
    }
    return res;
}

• Subtask 1: 17 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 0 / 32