Cod sursa(job #2678893)

Utilizator Chirac_MateiChiriac Matei Chirac_Matei Data 28 noiembrie 2020 22:39:37
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.47 kb
#include <bits/stdc++.h>

using namespace std;

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

int n,i,q,t,x;
int st,dr,mij,last;
int v[100005];
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];

    fin>>q;
    while(q)
    {
        q--;

        fin>>t>>x;
        st=1;
        dr=n;
        last=-1;

        if(t==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;

                if(v[mij]==x)
                {
                    last=mij;
                    st=mij+1;
                }
                if(v[mij]<x)
                    st=mij+1;
                if(v[mij]>x)
                    dr=mij-1;
            }
        }
        if(t==1)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;

                if(v[mij]<=x)
                {
                    last=mij;
                    st=mij+1;
                }
                else
                {
                    dr=mij-1;
                }
            }
        }
        if(t==2)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;

                if(v[mij]>=x)
                {
                    last=mij;
                    dr=mij-1;
                }
                else
                {
                    st=mij+1;
                }
            }
        }

        fout<<last<<'\n';
    }
    return 0;
}