Cod sursa(job #2610249)

Utilizator PREDVCAPreduca Matei PREDVCA Data 4 mai 2020 17:39:43
Problema Cautare binara Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.65 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");

int v[100001],vi[100001],vf[100001],n;
int w[100001];

int cautare0(int x)
{
    int dr,st,mij;
    dr=n;
    st=1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            return vf[mij];
        }
        if(v[mij]<x)
            st=mij+1;
        else
            dr=mij-1;
    }
    return -1;
}

int cautare1(int x)
{
    int dr,st,mij;
    st=1;
    dr=n;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (x<v[mij+1]&&x>=v[mij])
            return vf[mij];
        if (x<v[mij])
            dr=mij-1;
        else
            st=mij+1;
    }
}

int cautare2(int x)
{
    int dr,st,mij;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(x>v[mij-1]&&x<=v[mij])
            return vi[mij];
        if(x<v[mij])
            dr=mij-1;
        else
            st=mij+1;
    }
}
int main()
{
    int m,q,x,i,poz;
    fin>>n;
    for(i=1; i<=n; i++)
    {
        fin>>x;
        w[x]++;
    }
    n=0;
    poz=0;
    for(i=1; i<=100000; i++)
    {
        if(w[i]!=0)
        {
            n++;
            v[n]=i;
            vi[n]=poz+1;
            vf[n]=vi[n]+w[i]-1;
            poz=vf[n];
        }
    }
    fin>>m;
    for(i=1; i<=m; i++)
    {
        fin>>q>>x;
        if(q==0)
        {
            fout<<cautare0(x)<<'\n';
        }
        if(q==2)
        {
            fout<<cautare2(x)<<'\n';
        }
        if (q==1)
        {
            fout<<cautare1(x)<<'\n';
        }
    }
    return 0;
}