Submission #717254

#	Time	Username	Problem	Language	Result	Execution time	Memory
717254		TheSahib	Rice Hub (IOI11_ricehub)	C++14	100 / 100	94 ms	2540 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>

#define ll long long

using namespace std;

int besthub(int R, int L, int X[], long long B)
{
    ll preS[R + 1] = {0};
    for (int i = 1; i <= R; i++)
    {
        preS[i] = preS[i - 1] + X[i - 1];
    }
    
    int ans = 0;
    for (int i = 0; i < R; i++)
    {
        int l = i, r = R - 1;
        while(l <= r){
            int mid = (l + r) / 2;
            int m = (i + mid) / 2;
            int placement = X[m];

            int left = upper_bound(X, X + R, placement) - X - 1;
            ll s = -(preS[left + 1] - preS[i] - 1ll * (left - i + 1) * placement) + 
                    (preS[mid + 1] - preS[left] - 1ll * (mid - left + 1) * placement);
            
            if(s <= B){
                ans = max(ans, (mid - i + 1));
                l = mid + 1;
            }
            else{
                r = mid - 1;
            }
        }
    }
    return ans;
}

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