Cod sursa(job #833547)

Utilizator sleepaholicNeculaescu Theodor sleepaholic Data 12 decembrie 2012 18:17:39
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.74 kb
#include <fstream>

using namespace std;

ifstream in("cautbin.in");
ofstream out("cautbin.out");

int a[1<<17],n;

int caut0(int x)
{
int i,pas;
for(pas=1 ; pas<n ; pas<<=1);
for(i=0 ; pas ; pas>>=1)
if(i+pas<=n && a[i+pas]<=x)
i+=pas;
if(a[i]==x)
return i;
return -1;
}

int caut1(int x)
{
int i,pas;
for(pas=1 ; pas<n ; pas<<=1);
for(i=0 ; pas ; pas>>=1)
if(i+pas<=n && a[i+pas]<=x)
i+=pas;
return i;
}

int caut2(int x)
{
if(x==a[1])
return 1;
return 1+caut1(x-1);
}

int main(){
int ni;
in>>n;
for(int i=1;i<=n;i++){
in>>a[i];
}
in>>ni;
int tip,x;
for(int i=0;i<ni;i++){
in>>tip>>x;
if(tip==0)
out<<caut0(x);
if(tip==1)
out<<caut1(x);
if(tip==2)
out<<caut2(x);
out<<"\n";
}


return 0;
}