Cod sursa(job #2983344)

Utilizator AndreiMLCChesauan Andrei AndreiMLC Data 22 februarie 2023 10:50:53
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.53 kb
#include <bits/stdc++.h>

using namespace std;

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

int n,m,v[100005];

void cautbin0(int a)
{
    int st=0,dr = n-1, poz=-1;
    while(st<=dr)
    {
        int mij = (st+dr)/2;
        if(v[mij] == a)
        {
            poz = mij;
            st = mij+1;
        }else if(v[mij] <= a)
        {
            dr = mij-1;
        }else{
            st = mij+1;
        }
    }
    g << poz+1 << '\n';
}

void cautbin1(int a)
{
    int st=0,dr = n-1, poz=-1;
    while(st<=dr)
    {
        int mij = (st+dr)/2;
        if(v[mij] <= a)
        {
            poz = mij;
            st = mij+1;
        }else if(v[mij] <= a)
        {
            dr = mij-1;
        }else{
            st = mij+1;
        }
    }
    g << poz+1 << '\n';
}

void cautbin2(int a)
{
    int st=0,dr = n-1, poz=-1;
    while(st<=dr)
    {
        int mij = (st+dr)/2;
        if(v[mij] >= a)
        {
            poz = mij;
            dr = mij;
        }else if(v[mij] <= a)
        {
            dr = mij-1;
        }else{
            st = mij+1;
        }
    }
    g << poz+1 << '\n';
}
int main()
{
    f >> n;
    for(int i = 0;i<n;i++)
    {
        f >> v[i];
    }
    f >> m;
    for(int i = 1;i<=m;i++)
    {
        int q,nr;
        f >> q >> nr;
        if(q == 0)
        {
            cautbin0(nr);
        }else if(q==1)
        {
            cautbin1(nr);
        }else{
            cautbin2(nr);
        }
    }
    return 0;
}