Cod sursa(job #2596770)

Utilizator Katherine456719Swan Katherine Katherine456719 Data 10 aprilie 2020 13:11:07
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.06 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int v[100010],n;
void cautare0(int y)
{
    int r=0;
    for(int p=30; p>=0; p--)
        if(r+(1<<p)<=n and v[r+(1<<p)]<=y)
            r+=(1<<p);
    if(v[r]==y)
        g<<r<<"\n";
    else
        g<<-1<<"\n";
}
void cautare1(int y)
{
    int r=0;
    for(int p=30; p>=0; p--)
        if(r+(1<<p)<=n and v[r+(1<<p)]<=y)
            r+=(1<<p);
    if(v[r]<=y)
        g<<r<<"\n";
}
void cautare2(int y)
{
    int r=0;
    for(int p=0; p<=30; p++)
        if(r+(1<<p)<=n and v[r+(1<<p)]>=y)
        {
            g<<r+(1<<p)<<"\n";
            break;
        }
}
int main()
{
    int m;
    f>>n;
    for(int i=1; i<=n; i++)
        f>>v[i];
    f>>m;
    for(int i=1; i<=m; i++)
    {
        int x,y;
        f>>x>>y;
        if(x==0)
            cautare0(y);
        else
        {
            if(x==1)
                cautare1(y);
            else
                cautare2(y);
        }
    }
    return 0;
}