Mai intai trebuie sa te autentifici.

Cod sursa(job #2615016)

Utilizator As932Stanciu Andreea As932 Data 13 mai 2020 14:44:56
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.39 kb
#include <fstream>

using namespace std;

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

const int nmax=1e5;

int n,m;
int nr[nmax+5];

void read()
{
    cin>>n;

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

int op1(int x)
{
    int st=1,dr=n,sol=-1;

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

        if(nr[mij]==x)
        {
            sol=mij;
            st=mij+1;
        }
        else if(nr[mij]<x)
            st=mij+1;
        else
            dr=mij-1;
    }
    return sol;
}

int op2(int x)
{
    int st=1,dr=n,sol=1;

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

        if(nr[mij]<=x)
        {
            sol=mij;
            st=mij+1;
        }
        else
            dr=mij-1;
    }
    return sol;
}

int op3(int x)
{
    int st=1,dr=n,sol=n;

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

        if(nr[mij]>=x)
        {
            sol=mij;
            dr=mij-1;

        }
        else
            st=mij+1;
    }
    return sol;
}

void queries()
{
    cin>>m;

    for(int i=1;i<=m;i++)
    {
        int op,x;

        cin>>op>>x;

        if(op==0)
            cout<<op1(x)<<"\n";
        else if(op==1)
            cout<<op2(x)<<"\n";
        else
            cout<<op3(x)<<"\n";
    }
}

int main()
{
    read();
    queries();

    return 0;
}