제출 #123446

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
123446		nxteru	코끼리 (Dancing Elephants) (IOI11_elephants)	C++14	50 / 100	9041 ms	3832 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
#define F first
#define S second
#define MAX_N 150005
#define B 1600
int n,k,bs[MAX_N/B+1],p[MAX_N],l,cnt,ds[MAX_N/B+1][B*2+1],sz[MAX_N/B+1][B*2+1];
P id[MAX_N],el[MAX_N/B+1][B*2+1],pl[MAX_N];
void Bini(int x,P *xel,int xbs,int *xds,int *xsz){
	sort(xel,xel+xbs);
	for(int i=0;i<xbs;i++)id[xel[i].S]=P(x,i);
	int r=xbs;
	for(int i=xbs-1;i>=0;i--){
		while(r-1>=0&&xel[i].F+l<xel[r-1].F)r--;
		if(r==xbs){
			xds[i]=xel[i].F+l;
			xsz[i]=1;
		}else{
			xds[i]=xds[r];
			xsz[i]=xsz[r]+1;
		}
	}
}
void ALLini(void){
	for(int i=0;i<n;i++)pl[i]=P(p[i],i);
	sort(pl,pl+n);
	bs[0]=0;
	k=0;
	for(int i=0;i<n;i++){
		if(bs[k]>=B){
			k++;
			bs[k]=0;
		}
		el[k][bs[k]]=pl[i];
		id[pl[i].S]=P(k,bs[k]);
		bs[k]++;
	}
	for(int i=0;i<=k;i++)Bini(i,el[i],bs[i],ds[i],sz[i]);
}
void init(int N, int L, int X[]){
	n=N,l=L;
	for(int i=0;i<n;i++)p[i]=X[i];
	ALLini();
}
int update(int t, int y){
	int a=id[t].F,b=id[t].S;
	if(b!=bs[a]-1)el[a][b]=el[a][bs[a]-1];
	bs[a]--;
	Bini(a,el[a],bs[a],ds[a],sz[a]);
	p[t]=y;
	a=-1;
	while(a+1<=k&&bs[a+1]==0||(bs[a+1]>=1&&el[a+1][0].F<=y)){
		a++;
	}
	if(a==-1)a=0;
	el[a][bs[a]]=P(y,t);
	bs[a]++;
	Bini(a,el[a],bs[a],ds[a],sz[a]);
	int ans=0;
	a=0,b=-1;
	for(;a<=k;a++){
		if(bs[a]==0)continue;
		int c=upper_bound(el[a],el[a]+bs[a],P(b,n))-el[a];
		if(c==bs[a])continue;
		ans+=sz[a][c];
		b=ds[a][c];
	}
	cnt++;
	if(cnt>=B){
		cnt=0;
		ALLini();
	}
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

elephants.cpp: In function 'int update(int, int)':
elephants.cpp:54:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  while(a+1<=k&&bs[a+1]==0||(bs[a+1]>=1&&el[a+1][0].F<=y)){
        ~~~~~~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 24 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3