Cod sursa(job #2330342)

Utilizator bostanmateiBostan Matei-Calin bostanmatei Data 28 ianuarie 2019 11:33:45
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.13 kb
#include <bits/stdc++.h>

using namespace std;

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

int n,m,c,x,i,j,v[100005];

int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];

    fin>>m;
    for(i=1; i<=m; i++)
    {
        fin>>c>>x;

        int st,dr,mij;
        st=1;
        dr=n;

        if(c==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if (v[mij]>x) dr=mij-1;
                else           st=mij + 1;
            }
            if(v[dr] != x)
                fout<<"-1"<<'\n';
            else
                fout<<dr<<'\n';
        }

        if(c==1){
            while(st<=dr){
                mij=(st+dr)/2;
                if (v[mij]>x)   dr=mij-1;
                else            st=mij+1;
            }
            fout << dr << '\n';
        }
        if(c==2)
        {
            while(st<=dr){
                mij=(st+dr)/2;
                if (v[mij]>=x)  dr=mij-1;
                else            st=mij+1;
            }
            fout << st << '\n';
        }
    }
    return 0;
}