Cod sursa(job #1985394)

Utilizator luminitaivancea98ivancea luminita luminitaivancea98 Data 27 mai 2017 20:11:53
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.1 kb
#include <fstream>

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

        if(t==2){
            st=1;dr=n;
            while(st<=dr){
                mid=(st+dr)/2;
                if(v[mid]>=x)
                    dr=mid-1;
                else st=mid+1;
            }
            fout<<st<<endl;

        }
    }
    return 0;
}