Cod sursa(job #398799)

Utilizator osiceanu_paulOsiceanu paul osiceanu_paul Data 19 februarie 2010 13:28:00
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include<stdio.h>
int n,x[100000];
int caut0(int a)
{
	int i,pas=1<<16;
	for(i=0;pas;pas>>=1)
		if(i+pas<=n && x[i+pas]<=a) i+=pas;
	if(x[i]==a) return i;
	return -1;
}
int caut1(int a)
{
	int i,pas=1<<16;
	for(i=0;pas;pas>>=1)
		if(i+pas<=n &&x[i+pas]<=a) i+=pas;
	return i;
}
int caut2(int a)
{
	int i,pas=1<<16;
	for(i=0;pas;pas>>=1)
		if(i+pas<=n && x[i+pas]<a) i+=pas;
	return i+1;
}
	


int main()
{
	int i,m,k,c;
	freopen("cautbin.in","r",stdin);
	freopen("cautbin.out","w",stdout);
	
	scanf("%d",&n);
    for(i=1;i<=n;i++)
		scanf("%d ",&x[i]);
	scanf("%d",&m);
	for(i=1;i<=m;i++)
	{
		scanf("%d%d",&k,&c);
		if(k==0) printf("%d\n",caut0(c));
		if(k==1) printf("%d\n",caut1(c));
		if(k==2) printf("%d\n",caut2(c));
	}
	return 0;
}