Cod sursa(job #2088597)

Utilizator LucianaElenaPirlogea Luciana-Elena LucianaElena Data 15 decembrie 2017 16:11:31
Problema Cautare binara Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.28 kb
#include <fstream>

using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,p,u,cerinta,x,m,mid;
int v[100001],w[100001];
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++){
        fin>>cerinta;
        fin>>x;
        if(cerinta==0){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(x>=v[mid])
                    p=mid+1;
                else
                    u=mid-1;
            }
            if(v[u]==x)
                w[i]=u;
            else
                w[i]=-1;
        }
        if(cerinta==1){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(x>=v[mid])
                    p=mid+1;
                else
                    u=mid-1;
            }
            w[i]=u;
        }
        if(cerinta==2){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(x<=v[mid])
                    u=mid-1;
                else
                    p=mid+1;
            }
            w[i]=p;
        }
    }
    for(i=1;i<=m;i++){
        fout<<w[i];
        fout<<endl;
    }
    return 0;
}