Cod sursa(job #2344529)

Utilizator TudorChirila11Tudor Chirila TudorChirila11 Data 15 februarie 2019 10:46:05
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.23 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n, m, v[100005], i, j, tip, x;
int ok(int l, int r, int m, int key)
{
    if(v[m]<=key&&m>l)
        return 1;
    return 0;
}
int ok1(int l, int r, int m, int key)
{
    if(v[m]<key&&m>l)
        return 1;
    return 0;
}
int cautbin(int l, int r, int key)
{
    while(l!=r)
    {
        int m=(l+r+1)/2;
        if(ok(l,r,m,key))
            l=m;
        else r=m-1;
    }
    return l;
}
int cautbin1(int l, int r, int key)
{
    while(l!=r)
    {
        int m=(l+r+1)/2;
        if(ok1(l,r,m,key))
            l=m;
        else r=m-1;
    }
    return l;
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>tip>>x;
        if(tip==0)
        {
            int rez=cautbin(1,n,x);
            if(x!=v[rez])
                fout<<-1<<'\n';
            else fout<<rez<<'\n';
        }
        else if(tip==1)
        {
            int rez=cautbin(1,n,x);
            fout<<rez<<'\n';
        }
        else
        {
            int rez=cautbin1(0,n,x);
            fout<<rez+1<<'\n';
        }
    }
    return 0;
}