Cod sursa(job #2190625)

Utilizator georgeoctavianGeorge Octavian Grumazescu georgeoctavian Data 31 martie 2018 12:57:35
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.31 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int m,n,x,t,v[100010];
int func0(int st, int dr, int x)
{
    int mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
            st=mij+1;
        else
            dr=mij-1;
    }
    mij=(dr+st)/2;
    if(v[mij]>x)
        mij--;
    if(v[mij]==x)
        return mij;
    return -1;
}
int func1(int st, int dr, int x)
{
    int mij;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
            st=mij+1;
        else
            dr=mij;
    }
    mij=(st+dr)/2;
    if(v[mij]>x)
        mij--;
    return mij;
}
int func2(int st, int dr, int x)
{
    int mij;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<x)
            st=mij+1;
        else
            dr=mij;
    }
    mij=(dr+st)/2;
    if(v[mij]<x)
        mij++;
    return mij;
}
int main()
{
    int i;
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>t>>x;
        if(t==0)
            fout<<func0(1,n,x)<<'\n';
        if(t==1)
            fout<<func1(1,n,x)<<'\n';
        if(t==2)
            fout<<func2(1,n,x)<<'\n';
    }
    fin.close();
    fout.close();
    return 0;
}