Cod sursa(job #2189059)

Utilizator Mihai145Oprea Mihai Adrian Mihai145 Data 27 martie 2018 17:45:32
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.04 kb
#include <bits/stdc++.h>

using namespace std;

ifstream fin("cautabin.in");

ofstream fout("cautabin.out");

int n, m, v[100002], st, dr;

void unu(int x)
{
    int mijl;
    while(st<=dr)
    {
        mijl=st+(dr-st)/2;
        if(v[mijl]<=x)
            st=mijl+1;
        else dr=mijl-1;
    }
    if(v[st-1]==x)
        fout<<st-1<<'\n';
    else
        fout<<-1<<'\n';
}
void doi(int x)
{
    int mijl;
    while(st<=dr)
    {
        mijl=st+(dr-st)/2;
        if(v[mijl]<=x)
            st=mijl+1;
        else dr=mijl-1;
    }
    fout<<dr<<'\n';
}
void trei(int x)
{
    int mijl;
    while(st<=dr)
    {
        mijl=st+(dr-st)/2;
        if(v[mijl]>=x)
            dr=mijl-1;
        else st=mijl+1;
    }
    fout<<st<<'\n';
}
int main()
{
    int i, op, x;
    fin>>n;
    for(i=1; i<=n; i++) fin>>v[i];
    fin>>m;
    for(i=1; i<=m; i++)
    {
        fin>>op>>x;
        st=1, dr=n;
        if(op==0) unu(x);
        else if(op==1) doi(x);
        else trei(x);
    }
    return 0;

}