Cod sursa(job #2045951)

Utilizator Serban2331Foica Serban Serban2331 Data 23 octombrie 2017 09:45:39
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.69 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,v[100003],p,x,i,mij;
int cautare0(int l,int r,int k)
{
    while(l<=r)
    {
        mij=l+(r-l)/2;
        if(v[mij]==k)
        {
            if(v[mij+1]>k || mij==r)
            {
                return mij;
            }
            else
            {
                l=mij+1;
            }
        }
        else
        {
            if(v[mij]<k)
            {
                l=mij+1;
            }
            if(v[mij]>k)
            {
                r=mij-1;
            }
        }
    }
    return -1;
}
int cautare1(int l,int r,int k){
    while(l<=r)
    {
        mij=l+(r-l)/2;
        if(v[mij]<=k)
        {
            if(v[mij+1]>k || mij==r)
            {
                return mij;
            }
            else
            {
                l=mij+1;
            }
        }
        else
        {
            r=mij-1;
        }
    }
    return mij;
}
int cautare2(int l,int r,int k)
{
    while(l<=r)
    {
        mij=l+(r-l)/2;
        if(v[mij]>=k)
        {
            if(v[mij-1]<k || mij==l)
            {
                return mij;
            }
            else
            {
                r=mij-1;
            }
        }
        else
        {


                l=mij+1;


        }
    }
    return mij;
}
int main(){
    f>>n;
    for(i=1;i<=n;i++) f>>v[i];
    f>>m;
    for(i=1;i<=m;i++){
        f>>p>>x;
        if(p==0)  g<<cautare0(1,n,x)<<"\n";

        if(p==1) g<<cautare1(1,n,x)<<"\n";

        if(p==2)  g<<cautare2(1,n,x)<<"\n";
    }
    return 0;
}