Submission #49996

#	Time	Username	Problem	Language	Result	Execution time	Memory
49996		Diuven	Rice Hub (IOI11_ricehub)	C++11	100 / 100	27 ms	2284 KiB

ricehub

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

typedef long long ll;
const int MX=100010;

int X[MX], n, xmx;
ll S[MX];

ll _max(ll a, ll b){
	return a>b ? a : b;
}

ll cost(int l, int r){
	int mid=(l+r)/2;
	ll leftsum = 1LL*X[mid]*(mid-l+1) - (S[mid]-S[l-1]);
	ll rigtsum = (S[r]-S[mid]) - 1LL*X[mid]*(r-mid);
	return leftsum+rigtsum;
}

ll solve(ll maxCost){
	ll ans=0;
	for(int l=1, r=1; l<=n; l++){
		r=max(r,l);
		while(r<n && cost(l,r+1)<=maxCost) r++;
		if(cost(l,r)>maxCost) continue;
		ans=_max(ans, 0LL+r-l+1);
	}
	return ans;
}

int besthub(int R, int L, int XX[], ll B) {
	n=R, xmx=L;
	for(int i=1; i<=n; i++){
		X[i]=XX[i-1];
		S[i]=S[i-1]+X[i];
	}
	return solve(B);
}

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