Submission #741142

#	Time	Username	Problem	Language	Result	Execution time	Memory
741142		LCJLY	Rice Hub (IOI11_ricehub)	C++14	100 / 100	12 ms	2264 KiB

ricehub

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

using namespace std;

int besthub(int R, int L, int X[], long long B)
{
	int n=R,k=L;
	long long arr[n+5];
	for(int x=0;x<n;x++){
		arr[x+1]=X[x];
	}	
	
	long long psum[n+5];
	for(int x=1;x<=n;x++){
		psum[x]=psum[x-1]+arr[x];
	}
	
	long long l=1;
	int ans=0;
	
	for(long long x=1;x<=n;x++){
		while(l<x){
			long long mid=(l+x)/2;
			long long cost=arr[mid]*(mid-l)-(psum[mid-1]-psum[l-1])+(psum[x]-psum[mid])-arr[mid]*(x-mid);
			
			if(cost>B){
				l++;
			}
			else{
				break;
			}
		}
		ans=max(ans,(int)x-(int)l+1);
	}
	
	return ans;
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:8:10: warning: unused variable 'k' [-Wunused-variable]
    8 |  int n=R,k=L;
      |          ^

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