Cod sursa(job #1671756)

Utilizator Rares09Rares I Rares09 Data 2 aprilie 2016 10:07:53
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.39 kb
#include <fstream>

using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int v[100001],n,m,a,b,i;
int cb0 (int b, int n, int v[]) {
    int mij,st=1,dr=n;

    while (st <= dr) {
        mij = (st + dr) / 2;
        if (v[mij] <= b)
            st=mij+1;
        else if(v[mij]>b)
            dr=mij-1;
    }
    mij = (st + dr) / 2;

    if (v[mij] > b) mij --;
    if (v[mij] == b)
        return mij;
    return -1;
}

int cb1 (int b, int n, int v[]) {
    int
    mij, st=1,dr=n;

    while (st < dr){
        mij = (st + dr) / 2;
        if (v[
            mij] <= b)
            st=mij+1;
        else if(v[mij]>b)
            dr=mij;
    }

    mij = (st + dr) / 2;
    if (v[mij] > b)
       mij--;
    return mij;
}

int cb2 (int b, int n, int v[]) {
    int mij,st=1,dr=n;

    while (st < dr) {

        mij=(st+dr) / 2;
        if (v[mij] < b)
            st=mij+1;
        else if(v[mij]>=b)
            dr=mij;
    }

    mij = (st + dr) / 2;
    if (v[mij] < b)
       mij++;
    return mij;
}
int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];
    fin>>m;
    for(i=1; i<=m;i++)
    {
        fin>>a>>b;
        if(a==0)
            fout<<cb0(b,n,v)<<'\n';
        else if(a==1)
            fout<<cb1(b,n,v)<<'\n';
        else
            fout<<cb2(b,n,v)<<'\n';
    }
    return 0;
}