Cod sursa(job #2172539)

Utilizator miruna999Morarasu Miruna miruna999 Data 15 martie 2018 16:54:06
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.29 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,a[100002];

int caut0(int x, int st, int dr)
{
    int m;
    if(st<=dr)
    {
        m=(st+dr)/2;
        if(a[m]>x)
            return caut0(x,st,m-1);
        else
            return caut0(x,m+1,dr);
    }
    m=(st+dr)/2;
    if(a[m]>x) --m;
    if(a[m]==x)
        return m;
    return -1;
}

int caut1(int x, int st, int dr)
{
    int m;
    if(st<=dr)
    {
        m=(st+dr)/2;
        if(a[m]>x)
            return caut1(x,st,m-1);
        else
            return caut1(x,m+1,dr);
    }
    m=(st+dr)/2;
    if(a[m]>x) --m;
    return m;
}

int caut2(int x, int st, int dr)
{
    int m;
    if(st<=dr)
    {
        m=(st+dr)/2;
        if(a[m]>=x)
            return caut2(x,st,m-1);
        else
            return caut2(x,m+1,dr);
    }
    m=(st+dr)/2;
    if(a[m]<x) ++m;
    return m;
}

int main()
{
    f>>n;
    for(int i=1;i<=n;i++)
        f>>a[i];
    f>>m;
    for(int i=1;i<=m;i++)
    {
        int x,v;
        f>>v>>x;
        if(v==0)
            g<<caut0(x,1,n)<<'\n';
        else
        if(v==1)
            g<<caut1(x,1,n)<<'\n';
        else
            g<<caut2(x,1,n)<<'\n';
    }
    return 0;
}