Cod sursa(job #2286593)

Utilizator DariaPopescuDaria Popescu DariaPopescu Data 20 noiembrie 2018 15:49:13
Problema Cautare binara Scor 60
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.36 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,v[1000005],x,y,st,dr,mij,m,j,a[100000],b[100000];
int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
    {
        fin>>v[i];
    }
    fin>>m;
    for (j=1; j<=m; j++)
    {
        fin >>a[j]>>b[j];
    }
    for(j=1; j<=m; j++)
    {
        x=a[j];
        y=b[j];
        st=1;
        dr=n;
        if(x==1)
        {
            while(st!=dr)
            {
                mij=(st+dr+1)/2;
                if(v[mij]<=y)
                    st=mij;
                else
                    dr=mij-1;
            }
            fout<<st<<'\n';
        }
        else if(x==0)
        {
            while(st!=dr)
            {
                mij=(st+dr+1)/2;
                if(v[mij]<=y)
                    st=mij;
                else
                    dr=mij-1;
            }
            if(v[st]==y)
                fout<<st<<'\n';
            else
                fout<<"-1"<<'\n';
        }
        else
        {
            while (st!=dr)
            {
                mij=(st+dr)/2;
                if (v[mij]>=y)

                {
                    dr=mij;
                }
                else
                    st=mij+1;
            }
            fout<<st<<'\n';
        }
    }
    return 0;
}