Cod sursa(job #2829479)

Utilizator David8406Marian David David8406 Data 8 ianuarie 2022 17:26:31
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.32 kb
#include <bits/stdc++.h>

using namespace std;
int a[100005];
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int cautare_binara0(int n, int x)
{
    int st,dr,mij;
    st=1;
    dr=n;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (x<a[mij])
            dr=mij-1;
        if (x>=a[mij])
            st=mij+1;
    }
    if (a[dr]==x)
        return dr;
    return -1;
}

int cautare_binara1(int n, int x)
{
    int st,dr,mij;
    st=1;
    dr=n;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (x<a[mij])
            dr=mij-1;
        if (x>=a[mij])
            st=mij+1;
    }
    return dr;
}
int cautare_binara2(int n, int x)
{
    int st,dr,mij;
    st=1;
    dr=n;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (x<=a[mij])
            dr=mij-1;
        if (x>a[mij])
            st=mij+1;
    }
    return st;
}
int n,m,k,x;
int main()
{
    fin>>n;
    for (int i=1; i<=n; i++) fin>>a[i];
    fin>>m;
    for (int i=1; i<=m; i++)
    {
        fin>>k>>x;
        if (k==0)
        {
            fout<<cautare_binara0(n,x)<<"\n";
        }
        else if (k==1)
        {
            fout<<cautare_binara1(n,x)<<"\n";
        }
        else if (k==2)
        {
            fout<<cautare_binara2(n,x)<<"\n";
        }
    }
}