Submission #70751

#	Time	Username	Problem	Language	Result	Execution time	Memory
70751		MrTEK	Rice Hub (IOI11_ricehub)	C++14	100 / 100	49 ms	16144 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
#define N 100005
using namespace std;

int n,ar[N],ans;
long long b,pre[N];

bool check(int l,int r) {
	long long sum = 0;
	int mid = (l + r) / 2;
	sum = 1ll * ar[mid] * (mid - l + 1) - (pre[mid] - pre[l - 1]);
	sum += (pre[r] - pre[mid - 1]) - (1ll * ar[mid] * (r - mid + 1)); 
	return sum <= b;
}

int besthub(int R, int L, int X[], long long B) {
	n = R;
	b = B;
	for (int i = 1 ; i <= n ; i++)
		ar[i] = X[i - 1];
	for (int i = 1 ; i <= n ; i++) 
		pre[i] = pre[i - 1] + ar[i];
	for (int i = 1  ; i <= n ; i++) {
		int l = i, r = n;
		while (l <= r) {
			int mid = (l + r) / 2;
			if (check(i,mid)) l = mid + 1;
			else r = mid - 1; 
		}
		ans = max(ans,l - i);
	}
	return ans;
}

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