Submission #1200604

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200604		crispxx	Rice Hub (IOI11_ricehub)	C++20	68 / 100	11 ms	1348 KiB

ricehub

#include "ricehub.h"

#include <bits/stdc++.h>
using namespace std;

#define all(x) x.begin(), x.end()
#define pb push_back
#define ar array
#define nl '\n'

// #include "grader.cpp"

int besthub(int n, int l, int x[], long long B) {
	vector<int> pref(n + 1);
	vector<int> a(n + 1);
	
	for(int i = 0; i < n; i++) {
		a[i + 1] = x[i];
		pref[i + 1] = pref[i] + x[i];
	}
	
	auto sum = [&](int l, int r) {
		if(l > r) return 0;
		return pref[r] - pref[l - 1];
	};
	
	int ans = 0;
	
	for(int i = 1; i <= n; i++) {
		int l = i, r = n;
		while(l < r) {
			int mid = (l + r + 1) >> 1;
			int j = (i + mid) >> 1;
			int cost = a[j] * (j - i) - sum(i, j - 1) + sum(j + 1, mid) - a[j] * (mid - j);
			if(cost <= B) {
				l = mid;
			} else {
				r = mid - 1;
			}
		}
		ans = max(ans, r - i + 1);
	}
	
	return ans;
}

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