Cod sursa(job #3003310)

Utilizator Mihai_AritonMihai Ariton Mihai_Ariton Data 15 martie 2023 17:36:15
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.41 kb
#include <bits/stdc++.h>
using namespace std;

int v[100005];
int main()
{
    ifstream cin("cautbin.in");
    ofstream cout("cautbin.out");
    
    int n, m, a, t, st, dr, mij, ans;
    cin>>n;
    for(int i=1; i<=n; i++)
    cin>>v[i];
    cin>>m;
    for(int i=1; i<=m; i++)
    {
        cin>>t>>a;
        st=1;dr=n;
        if(t==0)
        {
            ans=-1;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]>a)
                dr=mij-1;
                else
                {
                    st=mij+1;
                    ans=mij;
                }
            }
            if(v[ans]!=a)cout<<"-1\n";
            else cout<<ans<<'\n';
        }
        else if(t==1)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]>a)
                dr=mij-1;
                else
                {
                    st=mij+1;
                    ans=mij;
                }
            }
            cout<<ans<<'\n';
        }
        else
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<a)
                st=mij+1;
                else
                {
                    dr=mij-1;
                    ans=mij;
                }
            }
            cout<<ans<<'\n';
        }
    }

    return 0;
}