Cod sursa(job #2850008)

Utilizator carinamariaCarina Maria Viespescu carinamaria Data 16 februarie 2022 09:29:28
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.48 kb
#include <fstream>
using namespace std;
ifstream cin("cautbin.in");
ofstream cout("cautbin.out");
int v[100001], i, j, n, st, dr, mid, poz, c, x, m;
int main(){
    cin>>n;
    for(i=1;i<=n;i++){
        cin>>v[i];
    }
    cin>>m;
    for(i=1;i<=m;i++){
        cin>>c>>x;
        if(c==0){
            st=1;
            dr=n;
            poz=-1;
            while(st<=dr){
                int mid=(st+dr)/2;
                if(v[mid]>x)
                    dr=mid-1;
                else{
                    if(v[mid]<x)
                        st=mid+1;
                    else{
                        poz=mid;
                        st=mid+1;
                    }
                }
            }
            cout<<poz<<"\n";
        }
        if(c==1){
            st=1;
            dr=n;
            poz=-1;
            while(st<=dr){
                int mid=(st+dr)/2;
                if(v[mid]>x)
                    dr=mid-1;
                else{
                    poz=mid;
                    st=mid+1;
                }
            }
            cout<<poz<<"\n";
        }
        if(c==2){
            st=1;
            dr=n;
            poz=-1;
            while(st<=dr){
                int mid=(st+dr)/2;
                if(v[mid]<x)
                    st=mid+1;
                else{
                    poz=mid;
                    dr=mid-1;
                }
            }
            cout<<poz<<"\n";
        }

    }
}