Cod sursa(job #2445670)

Utilizator LORDENVraja Luca LORDEN Data 5 august 2019 11:00:06
Problema Cautare binara Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.34 kb
#include <fstream>

using namespace std;

ifstream cin("cautbin.in");
ofstream cout("cautbin.out");

int n,v[100005],m,p,x,val,y,pmax=-1,ok;

int bs0(int val)
{
    int st=0,dr=n,mij,sol=-1;

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

        if(v[mij]==val)
        {
            sol=mij;
            st=mij+1;
        }

        if(v[mij]>val)
            dr=mij-1;

        else
            st=mij+1;
    }

    if(sol!=-1)
        return -1;

}

int bs1(int val)
{
    int st=0,dr=n,mij,sol=-1;

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

        if(v[mij]<=val)
        {
            sol=mij;
            st=mij+1;
        }

        else
            dr=mij-1;

    }

    return sol;

}

int bs2(int val)
{
    int st=0,dr=n,mij,sol=-1;

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

        if(v[mij]>=val)
        {
            sol=mij;
            dr=mij-1;
        }

        else
            st=mij+1;
    }

    return sol;

}

int main()
{
    cin>>n;

    for(int i=1; i<=n; i++)
        cin>>v[i];

    cin>>m;

    for(int i=1; i<=m; i++)
    {
        cin>>x>>y;

        if(x==0)
            cout<<bs0(y)<<'\n';

        else if(x==1)
            cout<<bs1(y)<<'\n';

        else
            cout<<bs2(y)<<'\n';
    }

    return 0;

}