Cod sursa(job #2668084)

Utilizator valentina_veleatVeleat Valentina-Georgiana valentina_veleat Data 4 noiembrie 2020 14:21:47
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.21 kb
#include <bits/stdc++.h>
#define nmax 100005
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int a[nmax],n,m,x,c;
int cautbin(int x)
{
    int st=1,dr=n,poz=-1;
    while(st<=dr)
    {
        int m=(st + dr)/2;
        if(a[m]<=x)
        {
            poz=m;
            st=m+1;
        }
        else
            dr=m-1;
    }
    if(a[poz]==x)return poz;
    else return -1;
}
int pmm(int x)
{
    int st=1,dr=n,poz = 0;
    while(st<=dr)
    {
        int m=(st + dr)/2;
        if (a[m]>=x)
        {
            poz=m;
            dr=m-1;
        }
        else
            st=m+1;
    }
    return poz;
}
int umm(int x)
{
    int st=1,dr=n,poz=0;
    while(st<=dr)
    {
        int m=(st+dr)/2;
        if (a[m]<=x)
        {
            poz=m;
            st=m+1;
        }
        else
            dr=m-1;
    }
    return poz;
}

int main()
{
    f>>n;
    for(int i=1;i<=n;i++)
        f>>a[i];
    f>>m;
    for(int i = 1; i<=m; i++)
    {
        f>>c>>x;
        if(c==0)
            g<<cautbin(x)<<'\n';
        else if(c==2)
            g<<pmm(x)<<'\n';
        else
            g<<umm(x)<<'\n';
    }
    return 0;
}