제출 #93996

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
93996		fjzzq2002	쌀 창고 (IOI11_ricehub)	C++14	100 / 100	222 ms	2664 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll qz[123456];
int besthub(int N,int L_,int X[],ll B)
{
	int ans=0;
	for(int i=0;i<N;++i)
		qz[i+1]=qz[i]+X[i];
	for(int i=0;i<N;++i)
	{
		int u=X[i];
		int L=0,R=1.01e9;
		while(L<R)
		{
			int M=(L+R+1)>>1;
			int u1=lower_bound(X,X+N,u-M)-X,
			u2=lower_bound(X,X+N,u+M+1)-X-1;
			//[u1,i] [i,u2]
			ll co=(i-u1+1)*ll(u)-(qz[i+1]-qz[u1])
			+(qz[u2+1]-qz[i])-(u2-i+1)*ll(u);
			int cn=u2-u1+1;
			if(co>B) R=M-1; else L=M;
		}
		{
			int M=L;
			int u1=lower_bound(X,X+N,u-M)-X,
			u2=lower_bound(X,X+N,u+M+1)-X-1;
			//[u1,i] [i,u2]
			ll co=(i-u1+1)*ll(u)-(qz[i+1]-qz[u1])
			+(qz[u2+1]-qz[i])-(u2-i+1)*ll(u);
			int cn=u2-u1+1;
			ll w=B-co;
			if(cn!=N) cn+=w/(M+1);
			ans=max(ans,cn);
		}
	}
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

ricehub.cpp: In function 'int besthub(int, int, int*, ll)':
ricehub.cpp:23:8: warning: unused variable 'cn' [-Wunused-variable]
    int cn=u2-u1+1;
        ^~

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