Cod sursa(job #876169)

Utilizator gerd13David Gergely gerd13 Data 11 februarie 2013 14:43:14
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.43 kb
#include<iostream>
#include<cstdio>
#include<cstdlib>
#define N 100010
int v[N];
using namespace std;

int binary_search0(int p, int u, int k)
{
    int m;
    while(p<=u)
    {
        m=(p+u)/2;
        if(v[m]<=k)
            p=m+1;
        else
            u=m-1;
    }
    m=(p+u)/2;

    if(v[m]>k)
    m --;
    if (v[m] == k)
        return m;
    return -1;
}

int binary_search1 (int p, int u, int k) {
    int m, n=u;

    while (p<u){
        m=(p+u)/2;
        if(v[m]<=k)
            p=m+1;
        else
            u=m;
    }

    m=(p+u)/2;
    if(v[m]>k)
       m--;
    return m;
}

int binary_search2 (int p, int u, int k) {
    int m;

    while (p<u) {
        m=(p+u)/2;
        if(v[m]<k)
            p=m+1;
        else
            u=m;
    }

    m=(p+u)/2;
    if(v[m]<k)
       m++;
    return m;
}
 int main () {
    int i, n, m, tip, val;

ifstream cin("cautbin.in");
    ofstream cout("cautbin.out");
    cin>>n;
    for(i=1; i<=n; i++)
        cin>>v[i];

    cin>>m;

    while(m--){
          cin>>tip>>val;
          if (tip == 0)
          cout<<binary_search0<<1<<" "<<n<<" "<<val<<"\n";
          if (tip == 1)
             cout<<binary_search1<<1<<" "<<n<<" "<<val<<"\n";
          if (tip == 2)
            cout<<binary_search2<<" "<<1<<" "<<n<<" "<<val<<"\n";
            cin.close();
            cout.clsoe();

    }
    
    return 0;
}