Cod sursa(job #3290009)

Utilizator oliviamMarin Olivia oliviam Data 29 martie 2025 11:58:04
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.37 kb
#include <iostream>
#include <fstream>

using namespace std;
const int NMAX=100000;

int N,v[NMAX+1];

ifstream f("cautbin.in");
ofstream g("cautbin.out");

int caut0(int x)
{
    int st=1,dr=N,mij,poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            if(v[mij]>x) dr=mij-1;
            else st=mij+1;
    }
    return poz;
}

int caut1(int x)
{
    int st=1,dr=N,mij,poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            dr=mij-1;
    }
    return poz;
}

int caut2(int x)
{
    int st=1,dr=N,mij,poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
        {
            poz=mij;
            dr=mij-1;
        }
        else
            st=mij+1;
    }
    return poz;
}

int main()
{
    int M,x,t;
    f>>N;
    for(int i=1;i<=N;i++) f>>v[i];
    f>>M;
    while(M--)
    {
        f>>t>>x;
        switch(t)
        {
        case 0:
            g<<caut0(x)<<'\n';
            break;
        case 1:
            g<<caut1(x)<<'\n';
            break;
        case 2:
            g<<caut2(x)<<'\n';
        }
    }
    f.close();
    g.close();
    return 0;
}