CS Course HDU - 6186

https://vjudge.net/contest/238207#problem/E

前缀数组后缀数组 

#include<iostream>
#include<cstdio>

using namespace std;

const int N=1e5;

int a[N+10],ands[N+10],ande[N+10],ors[N+10],ore[N+10];

int main (void)
{
	int m,n;
	while(scanf("%d%d",&m,&n)!=EOF)
	{
		int i,xo;
		
		ands[0]=ande[m+1]=0;
		ands[0]=~ands[0];
		ande[m+1]=~ande[m+1];
		ors[0]=ore[n+1]=0;
		xo=0;
		
			
			
		for(i=1;i<=m;i++)
		{
			scanf("%d",&a[i]);
			ands[i]=ands[i-1]&a[i];
			ors[i]=ors[i-1]|a[i];
			xo^=a[i];
		} 
		
		for(i=m;i>=1;i--)
		{
			ande[i]=ande[i+1]&a[i];
			ore[i]=ore[i+1]|a[i];
		}
		int va; 
		for(i=1;i<=n;i++)
		{
		   
			scanf("%d",&va);
	
			printf("%d %d %d\n",ands[va-1]&ande[va+1],ors[va-1]|ore[va+1],xo^a[va]);
		} 
	}
	return 0;
}